House Democrats want to hear testimony from acting White House chief of staff Mick Mulvaney Mick MulvaneyOn The Money: House panel pulls Powell into partisan battles | New York considers hiking taxes on the rich | Treasury: Trump's payroll tax deferral won't hurt Social Security Blockchain trade group names Mick Mulvaney to board Mick Mulvaney to start hedge fund MORE in their impeachment inquiry after he acknowledged Thursday that the administration held up military aid to Ukraine until Kiev launched a political investigation requested by 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.



The three House committees running the impeachment inquiry — Intelligence, Foreign Affairs and Oversight — had issued a subpoena to Mulvaney earlier this month for documents. The deadline for the records is Friday.



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But Democrats on Thursday expressed interest in hearing from Mulvaney in person after he held a rare press conference at the White House in which he said Trump wanted the Ukrainian government to investigate unproven 2016 election interference allegations about a hacked Democratic National Committee (DNC) email server.When asked if what he described was a quid pro quo for military aid, Mulvaney responded by saying, "We do that all the time with foreign policy." He then pointed to pressing Central American countries that receive U.S. aid to overhaul their immigration policies.“Get over it. There’s going to be political influence in foreign policy,” Mulvaney added.When asked if Mulvaney should testify, Rep.(D-Va.), a senior member of the House Oversight Committee, quickly responded with an emphatic "yes.""I guess having failed at discrediting the facts of this case, they've decided on a new tactic, which is to admit them and basically say, 'So what?' And the answer to that is, 'Well, the "so what" is you're going to be impeached,'" Connolly said. "Because that's abuse of office. And extortion, the last time I checked, is still a crime."

Mulvaney later tried to walk back his comments in a statement released by the White House.



"The president never told me to withhold any money until the Ukrainians did anything related to the server. The only reasons we were holding the money was because of concern about lack of support from other nations and concerns over corruption," Mulvaney said.



Rep. Stephen Lynch Stephen Francis LynchOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Official: Pentagon has started 'prudent planning' for full Afghanistan withdrawal by May Overnight Defense: Dems divided on length of stopgap spending measure | Afghan envoy agrees to testify before House panel | Trump leans into foreign policy in campaign's final stretch MORE (D-Mass.), another member of the Oversight Committee, said there's been a growing appetite for Mulvaney's testimony, even before Thursday's press conference.



"I'm sure a lot of people would like to hear from him," Lynch said.

Democrats have not issued a subpoena for Mulvaney to testify in person.



An appearance by Mulvaney would mean testifying before lawmakers who were his colleagues in the House until he resigned in 2017 to become director of the Office of Management and Budget.



Rep. David Cicilline David Nicola CicillineClark rolls out endorsements in assistant Speaker race Races heat up for House leadership posts The folly of Cicilline's 'Glass-Steagall for Tech' MORE (D-R.I.), a member of the Judiciary Committee, which would handle articles of impeachment, said, "I think Mick Mulvaney has important information to share."



House Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE (D-Calif.) did not respond to reporters' questions Thursday about whether Mulvaney will be called to testify.



But Schiff warned that Mulvaney's public comments have made things "much, much worse."



"The fact that [acting] chief of staff Mulvaney, with his acknowledgement now that military aid to a vital ally, an ally battling Russia as we speak, was withheld in part out of desire by the president to have Ukraine investigate the DNC server or Democrats or 2016, things have just gone from very, very bad to much, much worse," Schiff said.



"The idea that vital military assistance would be withheld for such a patently political reason for the reason of serving the president's reelection campaign is a phenomenal breach of the president's duty to defend our national security and I hope that every member, Democrat and Republican, will speak out and condemn this illicit action by the president and his chief of staff," Schiff added.



While Mulvaney acknowledged that Trump had urged the Ukrainian government to investigate unsubstantiated allegations that Ukraine was involved in the DNC hack, he maintained that the military aid was not delayed because of a push to investigate 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 and his son Hunter's business dealings.



“The money held up had absolutely nothing to do with Biden," Mulvaney said Thursday.



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A rough transcript of a July 25 call between Trump and Ukrainian President Volodymyr Zelensky shows Trump raising the prospect of investigating the Bidens.The House committees have subpoenaed Mulvaney for documents related to the July 25 call; the delay in Ukraine aid; the removal of Marie Yovanovitch as U.S. ambassador to Ukraine; communications with Trump's personal lawyer,; and efforts by White House staff to restrict access to the transcript of the call between Trump and Zelensky, as alleged by the intelligence community whistleblower complaint that sparked the impeachment inquiry.The White House has said it will refuse to comply with the investigation, citing the lack of a formal House vote to authorize the impeachment inquiry. But Democratic leaders decided earlier this week that a vote would be unnecessary.