A grass-roots campaign on Tuesday launched an effort to urge House Democrats to begin impeachment proceedings against 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.

Stand Up America and its nearly 2.4 million members are planning to mobilize lawmakers through calls, a digital ad campaign, text messages and a new website, which will give constituents resources to reach out about impeachment.

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In a press release, the group called for an inquiry to be started in response to special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's report on the findings in a nearly two-year investigation into Russia's election interference.

Mueller's investigation did not uncover proof of coordination between Trump's campaign and the Kremlin to influence the 2016 election, but did confirm the intelligence community's conclusion that Russia interfered in America's election.

The report did not make a conclusion on whether Trump or his administration committed obstruction of justice, but listed 10 examples of possible obstruction.

“The Mueller report exposes how Trump welcomed an attack on our democracy from a hostile foreign nation to help him win, and how he broke the law to cover up the truth," Stand Up America Founder and President Sean Eldridge said in a statement.

"It details over 10 episodes of obstruction of justice, including witness tampering, dangling pardons to discourage cooperation with prosecutors, and ordering the White House counsel to fire the special counsel—and then later to lie about that order. These are high crimes."

“We can’t hold off any longer.”

Speaker Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.) has faced increased pressure from many House Democrats in recent weeks to launch impeachment proceedings against the president.

The California lawmaker has maintained that beginning impeachment proceedings would be premature.

If the House does launch proceedings, GOP senators have promised to quash them.