The Latest on the 2020 presidential campaign (all times local):

9:45 a.m.

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Democratic presidential candidate and former Vice President Joe Biden speaks at a campaign event Friday, Feb. 14, 2020, in Henderson, Nev. (AP PhotoJohn Locher)

The Latest on the 2020 presidential campaign (all times local):

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., makes a pinky promise with Ming'Le Planter, 6, at Bertha's Kitchen, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Early voting started Saturday morning at more than 80 locations across the state. Nevada Democrats are holding four days of early voting for their caucuses, the first test of a candidate’s appeal to a diverse population with strong labor unions.

Democratic presidential candidate, businessman Tom Steyer, center, visits with attendees as they pose for a photo after a campaign event, Friday, Feb. 14, 2020, in Las Vegas. (AP PhotoPatrick Semansky)

Candidates are making a get-out-the-vote push with rallies and town halls Saturday, followed by appearances Saturday night at a fundraising gala for the Las Vegas-based Clark County Democratic Party.

Democratic presidential candidate and former South Bend Mayor Pete Buttigieg speaks at a town hall rally in Sacramento, Calif., Friday, Feb. 14, 2020.(AP PhotoRich Pedroncelli)

Democratic presidential candidate and former South Bend Mayor Pete Buttigieg speaks at a town hall rally in Sacramento, Calif., Friday, Feb. 14, 2020.(AP PhotoRich Pedroncelli)

Democratic presidential candidate Sen. Amy Klobuchar, D-Minn., speaks during a campaign rally at the Boys and Girls Club of Truckee Meadows in Reno, Nev., Friday Feb. 14, 2020. (Jason BeanThe Reno Gazette-Journal via AP)

Democratic presidential candidate Sen. Amy Klobuchar, D-Minn., speaks during a campaign rally at the Boys and Girls Club of Truckee Meadows in Reno, Nev., Friday Feb. 14, 2020. (Jason BeanThe Reno Gazette-Journal via AP)

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., right, meets with Berth's Kitchen co-owner Linda Pinckney, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., right, meets with Berth's Kitchen co-owner Linda Pinckney, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Democrats are starting to cast votes in Nevada’s presidential caucuses as the still-crowded field of candidates is fanning out across Las Vegas.

Democratic presidential candidate and former Vice President Joe Biden speaks at a campaign event Friday, Feb. 14, 2020, in Henderson, Nev. (AP PhotoJohn Locher)

Democratic presidential candidate and former Vice President Joe Biden speaks at a campaign event Friday, Feb. 14, 2020, in Henderson, Nev. (AP PhotoJohn Locher)

Early voting started Saturday morning at more than 80 locations across the state. Nevada Democrats are holding four days of early voting for their caucuses, the first test of a candidate’s appeal to a diverse population with strong labor unions.

Early votes cast on paper ballots will be added to in-person caucus votes made on Feb. 22, when Democrats will attend about 2,000 precinct meetings around the state.

This year, with the results of Iowa's caucuses muddled by technology and reporting problems, Nevada is under pressure to pull off a problem-free caucus. The Nevada State Democratic Party abandoned its original plans to use an app like the one that caused trouble in Iowa and has scrambled to come up with a new system to tabulate results.

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., makes a pinky promise with Ming'Le Planter, 6, at Bertha's Kitchen, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., makes a pinky promise with Ming'Le Planter, 6, at Bertha's Kitchen, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Candidates are making a get-out-the-vote push with rallies and town halls Saturday, followed by appearances Saturday night at a fundraising gala for the Las Vegas-based Clark County Democratic Party.

Democratic presidential candidate, businessman Tom Steyer, center, visits with attendees as they pose for a photo after a campaign event, Friday, Feb. 14, 2020, in Las Vegas. (AP PhotoPatrick Semansky)

Democratic presidential candidate, businessman Tom Steyer, center, visits with attendees as they pose for a photo after a campaign event, Friday, Feb. 14, 2020, in Las Vegas. (AP PhotoPatrick Semansky)

Democratic presidential candidate and former South Bend Mayor Pete Buttigieg speaks at a town hall rally in Sacramento, Calif., Friday, Feb. 14, 2020.(AP PhotoRich Pedroncelli)

Democratic presidential candidate and former South Bend Mayor Pete Buttigieg speaks at a town hall rally in Sacramento, Calif., Friday, Feb. 14, 2020.(AP PhotoRich Pedroncelli)

Democratic presidential candidate Sen. Amy Klobuchar, D-Minn., speaks during a campaign rally at the Boys and Girls Club of Truckee Meadows in Reno, Nev., Friday Feb. 14, 2020. (Jason BeanThe Reno Gazette-Journal via AP)

Democratic presidential candidate Sen. Amy Klobuchar, D-Minn., speaks during a campaign rally at the Boys and Girls Club of Truckee Meadows in Reno, Nev., Friday Feb. 14, 2020. (Jason BeanThe Reno Gazette-Journal via AP)

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., right, meets with Berth's Kitchen co-owner Linda Pinckney, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)

Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., right, meets with Berth's Kitchen co-owner Linda Pinckney, Friday, Feb. 14, 2020, in North Charleston, S.C. (AP PhotoMatt Rourke)