Protesters will gather in Washington, D.C., and 135 other cities on Saturday to call for an independent commission to investigate possible collusion between President Trump's campaign and Russia to influence the outcome of the 2016 presidential election.

The "March for Truth" is the latest in a series of weekend protests opposing the Trump administration that has included the Women's March in January and the Tax March and March for Science in April.

Organizers of the latest demonstration are also demanding that Trump release his personal income tax returns.

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The march in Washington will include remarks by several Democratic lawmakers, including Rep. Al Green Alexander (Al) N. GreenThe Memo: Trump's race tactics fall flat Trump administration ending support for 7 Texas testing sites as coronavirus cases spike The Hill's Coronavirus Report: Miami mayor worries about suicide and domestic violence rise; Trump-governor debate intensifies MORE (D-Texas), who has called in recent weeks to impeach Trump. Jill Wine-Banks, a former Watergate special prosecutor, and Javier Muñoz, a star of the Broadway musical "Hamilton," are also expected to speak at the D.C. rally.

Investigations into Russia's efforts to interfere in the 2016 presidential election, as well as possible coordination between the Trump campaign and Moscow, have accelerated in recent weeks.

The Justice Department earlier this month appointed former FBI Director Robert Mueller as special counsel to lead the law enforcement investigation into the matter, a move that was widely applauded by both Republicans and Democrats.

Trump has repeatedly denied any collusion between his campaign and the Kremlin, insisting that the investigations are a "witch hunt" and amount to "fake news."