President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Thursday night defended his push for foreign governments to investigate allegations of corruption, asserting he has an "absolute right" to call for such help from a foreign power amid blowback over his push for probes into former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE.

"As the President of the United States, I have an absolute right, perhaps even a duty, to investigate, or have investigated, CORRUPTION, and that would include asking, or suggesting, other Countries to help us out!" Trump tweeted.

Trump maintained in a subsequent tweet that his push "isn't about a Campaign," despite political backlash for seeking probes related to Biden, a top political rival who is leading polls for his party's nomination to take on Trump in 2020.

This isn’t about a Campaign, this is about Corruption on a massive scale! https://t.co/DOCvfM8eqi — Donald J. Trump (@realDonaldTrump) October 4, 2019

The president fired off a series of tweets on Thursday night swiping at Democrats and their impeachment inquiry while also touting remarks from Republicans offering their take on a marathon hearing on Capitol Hill earlier in the day as part of the inquiry.

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Democrats emerged Thursday evening from a 10-hour deposition with Kurt Volker Kurt VolkerGOP senators request details on Hunter Biden's travel for probe Yovanovitch retires from State Department: reports Live coverage: Senators enter second day of questions in impeachment trial MORE, the president's former special envoy to Ukraine, saying that Volker had validated many of the previous assertions from a government whistleblower surrounding Trump's July phone call with the president of Ukraine in which Trump pressed his counterpart to "look into" Biden.

Meanwhile, Republicans rushed to Trump's defense following the marathon briefing, arguing that Volker's appearance provided new information about Biden's son, Hunter, who served on the board of a Ukrainian energy company. Trump has called for Ukraine to investigate the elder Biden and his push as vice president in 2016 for Ukraine to fire a prosecutor who was looking into the energy company. Both Bidens have denied wrongdoing, and no evidence has emerged of wrongdoing on the part of either one.

Democrats formally launched an impeachment inquiry into Trump based on his urging of Ukraine to investigate Biden. They have argued that such a move amounts to seeking foreign help to influence an election, a topic that has dominated much of Trump's time in office.

The chairwoman of the Federal Elections Commission (FEC) on Thursday retweeted an earlier message from herself emphasizing that "it is illegal for any person to solicit, accept, or receive anything of value from a foreign national in connection with a U.S. election."

FEC Chairwoman Ellen L. Weintraub shared the message on Twitter on Thursday after the president publicly encouraged both Ukraine and China to investigate Biden and his son. Trump made the remarks in front of cameras on the South Lawn of the White House.

The Biden campaign issued a statement decrying Trump's remarks, calling them "a grotesque choice of lies over truth and self over country." The campaign likened them to Trump's comments during the 2016 election in which he suggested Russia should try and find Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE's missing emails.