Actress Susan Sarandon said Monday that she had donated to the presidential campaign of former Sen. Mike Gravel (Alaska), one of more than a dozen Democrats in the running for the party's 2020 White House nomination.

Donated to @MikeGravel. The more Dem voices in the primary, the better! https://t.co/97rfE339sA — Susan Sarandon (@SusanSarandon) April 22, 2019

Gravel, 88, made it clear when announcing his campaign earlier this month that he is not interested in becoming president. Instead, he seeks to push "the field left by appearing in the Democratic debates."

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The staunch anti-imperialist served in the Senate from 1969 to 1981 and ran for president in 2008.

His campaign has been asking for donations of $1 to reach the 65,000-donor threshold necessary to appear in the Democratic presidential debates.

Sarandon, an outspoken critic of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE, has been active in the last two presidential campaign cycles.

In 2016, the Academy Award winner endorsed Green Party presidential nominee Jill Stein before also hitting the campaign trail for Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.).

Apart from Gravel, Sarandon has donated $2,800 to Sanders and $500 to Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) so far in the 2020 cycle.