Most Democrats want to impeach U.S. President Donald Trump, even if that means weakening their party's chances of winning back the White House in the 2020 election, according to a Reuters/Ipsos opinion poll.

The poll, conducted on Monday and Tuesday, found that 55% of Democrats said that their party leaders should press ahead with impeachment even "if it means a lengthy and expensive process that could weaken their chances of winning the presidency in 2020."

And even a higher number — 66 percent of Democrats — agreed that Congress should pursue impeachment, "even if that means they will need to postpone efforts to pass laws that could benefit me."