Will Trump Be Impeached or Resign? As Support for His Removal Soars, Approval Rating Plunges

President Donald Trump delivers remarks to troops at the Naval Air Station Sigonella in Sigonella, Sicily, Italy, before returning to Washington, D.C., May 27. Reuters

Support for the idea of impeaching President Donald Trump increased to 43 percent from 38 percent among U.S. voters in a Politico/Morning Consult poll released Wednesday, after his return from his first trip abroad since winning the White House.

Meanwhile, the president's approval rating is hovering just under 40 percent, according to FiveThiryEight, after taking a plunge amid new developments in an ongoing federal investigation into his campaign and administration's possible ties to the Kremlin. Even the latest right-leaning polls show Trump's approval rating sinking to 44 percent from 48 percent last week, according to a Rasmussen Reports index released Tuesday.

Related: Experts upgrade Trump's odds of impeachment

What's more, the greatest damage Trump could possibly do to both data sets may not have even occurred yet.

Trump's approval rating sits at ~39.2% (@FiveThirtyEight).
Meanwhile, 43% of the public now supports impeachment (@Politico). #MorningData pic.twitter.com/aKxSMVHZrb

— Chris Riotta (@chrisriotta) May 31, 2017

As the world fears Trump's upcoming decision as to whether the United States will pull out of the Paris Climate Accord—joining Syria and Nicaragua as the only nations absent from the virtually universal climate change agreement—the FBI's investigation into Russia's meddling in the 2016 election has ramped up as of late, including with the appointment of special counsel Robert Mueller to spearhead the probe.

The president could deal a significant blow to his own popularity by removing the nation from the climate accord, as well as by leaving behind other popular landmark deals, such as former President Barack Obama's health care initiative, the Affordable Care Act, which polls show now has more support among Americans than Trump.

Meanwhile, revelations that White House Senior Advisor Jared Kushner is a point of focus in the FBI's Russia investigation, and that the president allegedly told Russian officials in the Oval Office that former FBI Director James Comey was fired to ease the "pressure" on him due to the probe, could at some point result in more calls for Trump's impeachment.

Get ready for impeachment.

— Maxine Waters (@RepMaxineWaters) March 21, 2017

The Economist intelligence Unit, a nonpartisan global organization of political experts and economists, increased its forecast on the likelihood of Trump's impeachment to moderate from low on Friday, after Texas Representative Al Green called for the exhaustive political process to begin to the floor of Congress. Other lawmakers have also demanded impeachment, including Calfiornia Reprepresentative Maxine Waters, who tweeted March 21, "Get ready for impeachment."

"We note that the president's impulsive character and disregard for protocol means that even the unlikely is possible," the Economist intelligence Unit wrote in a statement to Newsweek. "But it would take a significant shift in mood, even allowing for his existing transgressions, to shift Republican loyalty away from Trump."

Other Americans also seem to support the idea of the president resigning from office, with numerous petitions calling on Trump to step down receiving hundreds of thousands of signatures online.

"The President violates the Title of Nobility Clause, as explained in Article I, Section 9 of the United States Constitution," states one petition, which had received nearly 150,000 signatures as of Wednesday. "Donald Trump has known financial ties with Russia, and owes hundreds of millions of dollars in debt to banks in foreign countries, such as China. The complicated business entanglements create a conflict of interest for national security issues. The American People deserve to see his tax returns."

The petition concludes: "Donald Trump needs to resign as President of the United States."