Virtually every single poll tracking President Donald Trump's approval rating showed the figure plummeting Monday morning, well below the margin of error compared to the rising level of support for impeachment. The results follow Trump's controversial decision to withdraw the United States from the Paris climate accord; the ongoing investigation into his campaign’s possible ties to the Kremlin is also a factor.

The president's approval rating dipped from nearly 42 percent to just 36 percent over the weekend, according to a Gallup daily tracking poll published Monday. Trump's declining popularity is inching closer toward his all-time low of 35 percent as president in March, when Gallup had the president’s approval at just 35 percent. What's more, nearly 43 percent of American voters support the idea of beginning the official impeachment process for Trump, according to a Politico/Morning Consult poll published Wednesday.

Related: Right-wing polls show Trump's plunging approval ratings

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There are slight discrepancies between several leading polls as to where the president’s approval officially stands, though each tracking poll published Monday and over the weekend seemed to show a decline in popularity following Trump's decision on the Paris Agreement. Even right-leaning poll sites like Rasmussen Reports are indicating dips in support for the president's job performance, reporting that as of Monday, 54 percent of the nation disapproves of Trump’s tenure as commander in chief.

Whereas Trump enjoyed record-high popularity near the end of his first trip abroad since assuming the Oval Office (nearing 42 percent or above in several polls and indexes), now he is once again in the historic territory of being one of the least popular new presidents in modern American history. The public’s increasing support for the exhaustive political process of removing the president from office comes at a time when Democratic lawmakers are taking to the airwaves and the floors of Congress to call for Trump’s impeachment.

Texas Rep. Al Green brought an official call to Congress to impeach the president May 17 and said he was writing drafts of impeachment articles. Firebrand California Rep. Maxine Waters was back on TV Sunday afternoon, demanding that her colleagues take Trump’s impeachment—and the allegations against him concerning his business interests and ties to Russia—seriously.

"We're also going to continue to talk about how this president and his allies, I believe and others believe, colluded with the Russians to undermine our democracy," Waters told Joy Reid on MSNBC on Sunday. "And we’re not going to stop talking about it, because this is extremely important to the future of this country."