New Jersey Sen. Cory Booker is on the ballot in New Hampshire, where he hopes his patience will pay off.

The Democratic presidential hopeful signed up for the first-in-the-nation presidential primary on Friday, the final day of the filing period. Though he lags behind in polls, Booker says he's not one to switch strategies or states to focus on, as some other candidates have done.

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Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

New Jersey Sen. Cory Booker is on the ballot in New Hampshire, where he hopes his patience will pay off.

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., passes by students from Bow Elementary School who were on a field trip to the State House as he departs after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., passes by students from Bow Elementary School who were on a field trip to the State House as he departs after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., signs a document that candidates from this New Hampshire primary sign with their name and campaign slogans, as he files to have his name listed on the primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., signs a document that candidates from this New Hampshire primary sign with their name and campaign slogans, as he files to have his name listed on the primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., speaks with supporters after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., speaks with supporters after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., left, embraces New Hampshire state Rep. Gerri Cannon after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., left, embraces New Hampshire state Rep. Gerri Cannon after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., pays the filing fee to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., pays the filing fee to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., shakes hands with New Hampshire Secretary of State Bill Gardner, left, after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., shakes hands with New Hampshire Secretary of State Bill Gardner, left, after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., files to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., files to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Booker’s latest trip to New Hampshire comes a day after former Massachusetts Gov. Deval Patrick jumped into the race. Booker says it's good to have robust competition, and that he doesn't take it personally that some of his close friends are also running.

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., addresses supporters outside the State House after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., passes by students from Bow Elementary School who were on a field trip to the State House as he departs after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., passes by students from Bow Elementary School who were on a field trip to the State House as he departs after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., signs a document that candidates from this New Hampshire primary sign with their name and campaign slogans, as he files to have his name listed on the primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., signs a document that candidates from this New Hampshire primary sign with their name and campaign slogans, as he files to have his name listed on the primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., speaks with supporters after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., speaks with supporters after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., left, embraces New Hampshire state Rep. Gerri Cannon after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., left, embraces New Hampshire state Rep. Gerri Cannon after he filed to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., pays the filing fee to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., pays the filing fee to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., shakes hands with New Hampshire Secretary of State Bill Gardner, left, after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., shakes hands with New Hampshire Secretary of State Bill Gardner, left, after filing to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., files to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)

Democratic presidential candidate Sen. Cory Booker, D-N.J., files to have his name listed on the New Hampshire primary ballot, Friday, Nov. 15, 2019, in Concord, N.H. At left is New Hampshire Secretary of State Bill Gardner. (AP PhotoCharles Krupa)