Voters check the lists of candidates in the parliamentary elections at a polling station in Tehran, Iran. AP
A woman gestures as she casts her vote at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Voters pose for a selfie during the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP Photo
A poll worker checks the ID of Iran's Supreme Leader Ayatollah Ali Khamenei who has arrived to cast his vote at a polling station during parliamentary elections in Tehran, Iran. Reuters
A man casts his vote during parliamentary elections at a polling station in Tehran, Iran. Reuters
A voter shows his identification and inked finger while voting for the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP Photo
Iranians fill in their ballot papers at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iranians fill in their ballot papers at a polling station during the parliamentary elections in Tehran, Iran on 21 February 2020. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iranian women cast their vote at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iran's leader Ayatollah Ali Khamenei casts his vote at a polling station during parliamentary elections in Tehran, Iran on February 21, 2020.
A voter registers to cast her vote during the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP
A voter fills out his ballot in the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP
Voters check the lists of candidates in the parliamentary elections at a polling station in Tehran, Iran. AP
A woman gestures as she casts her vote at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Voters pose for a selfie during the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP Photo
A poll worker checks the ID of Iran's Supreme Leader Ayatollah Ali Khamenei who has arrived to cast his vote at a polling station during parliamentary elections in Tehran, Iran. Reuters
A man casts his vote during parliamentary elections at a polling station in Tehran, Iran. Reuters
A voter shows his identification and inked finger while voting for the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP Photo
Iranians fill in their ballot papers at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iranians fill in their ballot papers at a polling station during the parliamentary elections in Tehran, Iran on 21 February 2020. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iranian women cast their vote at a polling station during the parliamentary elections in Tehran, Iran. Iranians head to polls amid a worsening economic crisis and escalating tensions with the United States. EPA
Iran's leader Ayatollah Ali Khamenei casts his vote at a polling station during parliamentary elections in Tehran, Iran on February 21, 2020.
A voter registers to cast her vote during the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP
A voter fills out his ballot in the parliamentary elections at a polling station in Tehran, Iran. Iranians began voting for a new parliament on 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. AP
Voters check the lists of candidates in the parliamentary elections at a polling station in Tehran, Iran. AP
Iran: All eyes on voter turnout as Iranians head to the polls
Hardliners are likely to increase their hold over parliament but threats of a boycott could undermine the leadership's credibility