Iranians began voting for a new parliament Friday, with turnout seen as a key measure of support for Iran's leadership as sanctions weigh on the economy and isolate the country diplomatically.

The disqualification of some 9,000 potential candidates, most of them reformists and moderates, raised the possibility of lower-than-usual turnout.

Iran's leadership and state media urged voter participation, with some framing it as a religious duty. Earlier this week, Iran's Supreme Leader Ayatollah Ali Khamenei said high voter turnout will thwart "plots and plans” by Americans and supporters of Israel against Iran.

Posters of candidates for the upcoming parliamentary elections are displayed on a car, in Tehran, Iran, Tuesday, Feb. 18, 2020. Iranian authorities have barred thousands of parliamentary candidates from running, mainly reformists and moderates. Friday's elections could strengthen the hand of Iranian hard-liners, who champion confronting the West. (AP PhotoVahid Salemi)

Posters of candidates for the upcoming parliamentary elections are displayed on a car, in Tehran, Iran, Tuesday, Feb. 18, 2020. Iranian authorities have barred thousands of parliamentary candidates from running, mainly reformists and moderates. Friday's elections could strengthen the hand of Iranian hard-liners, who champion confronting the West. (AP PhotoVahid Salemi)

“Enemies want to see what the results of the U.S. maximum pressure are,” Khamenei said. He was referring to U.S. sanctions and pressure from Washington that have strangled Iran's ability to sell its oil abroad, forcing its economy into recession.

Around 7,000 candidates are running in 208 constituencies for the 290-seat chamber.

Tensions with the United States could strengthen hard-liners by reinforcing long-held distrust of the West. The crisis with Washington spiked after a U.S. airstrike in January killed Iran’s top general, Qassem Soleimani. The strike led to a tense confrontation in which Iranian forces accidentally shot down a Ukrainian passenger plane after it took off from Tehran, killing all 176 people on board. Most of those killed were Iranian.

The shoot-down, and attempts by officials to initially conceal the cause of the crash sparked public anger and protests in Iran.

The election is being held at a time of growing economic hardship.

Iranians have seen the price of basic goods skyrocket, inflation and unemployment rise and the local currency plummet since President Donald Trump withdrew the U.S. from Iran’s nuclear agreement with world powers and imposed sanctions. The economic woes faced by ordinary Iranians fueled anti-government protests in November. International human rights groups say at least 300 people were killed in the protests.

The parliament in Iran does not have power to dictate major policies, but it does debate the annual budget and the possible impeachment of ministers. Power in Iran ultimately rests with Khamenei, who has final say on all key matters.

Also looming over the election is the threat of the new coronavirus, which has been confirmed in five people in Iran this week, including two elderly citizens who died in the city of Qom. Concerns over the spread of the virus, which originated in central China, prompted authorities in Iran to close all schools and Shiite seminaries in Qom.

A parliament stacked with hard-liners could favor expanding the budget for the Revolutionary Guard Corps, which has been sanctioned by the U.S. It could also tilt public policy debates toward hard-liners who are opposed to engagement with the U.S.

Current parliament speaker Ali Larijani decided to step down after 11 years and is not running for reelection. Mohammad Baqher Qalibaf, the former mayor of Tehran who is also the former head of the Revolutionary Guard air force, is seen as one of the front-runners to succeed Larijani.

The current parliament, elected in 2016, had more than 100 reformists and moderates, with the rest of the chamber split between independents and hard-liners. Some 90 current lawmakers were barred from running in Friday's election.

Nearly 58 million Iranians, out of a population of more than 80 million, are eligible to vote. Every Iranian above the age of 18 can vote.

Turnout has been over 50% in previous parliamentary elections. In 2016, it was nearly 62%.

The polls opened at 8 a.m. (0430 GMT) and close at 6 p.m. (1430 GMT), though polling stations have in the past stayed open late into the night to give people more time to cast their vote. Friday is a day of rest in Iran, as is the case across most Muslim countries.

Initial results are expected to be announced on Saturday. Presidential elections are expected to take place in 2021.