An empowered special counsel.
"Impeachment proceedings will only gain traction ... when initiated by a Republican or Republicans", said Renee Van Vechten, political science professor at the University of Redlands.
Nate Silver, statistician, writer, and founder and editor-in-chief of the website FiveThirtyEight, published a painstakingly detailed article at the end of May about the likelihood that Trump will be impeached.
That doesn't mean a very few Democrats aren't trying.
White House deputy press secretary Sarah Sanders dismissed the effort during Wednesday's press briefing.
"[President Donald Trump] had gone quiet over the last month, and we were starting to wonder if he might have ridden out the initial controversies - but he's back with a bang today", Price wrote in an email to Fortune Wednesday.
The impeachment article cites three ways the congressmen believe Trump sought to cause "hindrance or termination" of investigations into Russian interference in the 2016 election and "violations" by Flynn.
It was introduced by Democratic congressmen Al Green and Brad Sherman in the wake of news about Russia's possible involvement with the president's election campaign. "So what I keep hearing about that he would have rather had Trump, I think 'probably not, '" the US president said.
I stand for impeachment of the President. If the House passes an article or articles, the president is impeached, as Bill Clinton was in 1998.
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They may have seen advantage in helping a less experienced, a little bit more volatile candidate take the White House. Common sense tells us this is not criminal behavior. Mueller was appointed two months ago.
He added that Trump didn't explicitly tie dropping the investigation to Comey keeping his job, but that Trump "knew that Comey wanted to keep his job". Republican lawmakers would likely be hesitant to impeach a president from their own party, and Democratic leadership has been wary of broaching the topic. Whether, in addition to that, his misconduct also happens to violate penal statutes and be ripe for criminal prosecution is a side issue.
While talk of impeaching President Donald Trump has been in the news, it is unlikely that he will face such an action anytime soon.
Not even a Republican Senate could find a way to remove Clinton.
There's no bipartisan consensus now that Trump should go.