Rep. Rashida Tlaib (D-Mich.) has been circulating a letter calling for members of her party to join her as co-sponsors in an effort to find a reason to impeach President Donald Trump.

Here's what we know

But with special counsel Robert Mueller's final report lacking any clear cause for impeachment, Tlaib plans to keep searching. According to CNN, she wants congressional committees to launch investigations into a number of Trump-related topics that she thinks might produce some evidence that could be used for impeachment. These include Trump's business dealings and hush money payments made at Trump's request by his former lawyer, Michael Cohen.

The letter says, in part:

We all swore to protect our nation, and that begins with making sure that no one, including the President of the United States, is acting above the law. I urge your support in recommending that the House Committee on Judiciary begin hearings, take depositions, and issue subpoenas to answer this question that is fundamental to the rule of law and the preservation of our democracy.

Meanwhile, House Speaker Nancy Pelosi (D-Calif.) has refused to offer support for any impeachment proceedings, saying that Trump is "just not worth" the trouble.

In an interview posted March 11, she told The Washington Post, "Impeachment is so divisive to the country that unless there's something so compelling and overwhelming and bipartisan, I don't think we should go down that path, because it divides the country."

What is Tlaib's deadline?

Tlaib, however, has been consistent in her push to get the House to impeach Trump. On her first day in office after being sworn in, she made headlines for saying, "We're gonna go in there and we're gonna impeach the motherf***er."

On March 6, Tlaib promised to file impeachment proceedings later that same month. Now she wants her colleagues to join her by noon on Wednesday.