Sen. Rand Paul Randal (Rand) Howard PaulRon Paul hospitalized in Texas The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Rand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case MORE (R-Ky.) said on Thursday morning that U.S. aid to other countries "should be contingent upon behavior” as questions over whether 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 leveraged assistance to Ukraine to pressure Kiev 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 drives an impeachment investigation in the House.

“I think it’s not incorrect or wrong,” Paul said on "CBS This Morning," referring to Trump’s request. “What I would say: that aid that we give to other countries should be contingent upon behavior and whether or not we should have Ukraine trying to eradicate corruption, yes.”

“I think everybody has different ways that they would approach things,” he added when asked if he would have made the same request of Kiev if he were president.

Was it right or wrong?



"It's not incorrect or wrong... aid that we give to other countries should be contingent upon behavior.”



Would you have done this if you were elected for president?



“I think everybody has different ways that they would approach things.” -- Sen. @RandPaul pic.twitter.com/D1xlTEN47d — CBS This Morning (@CBSThisMorning) October 10, 2019

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A July 25 phone call between Trump and Ukrainian President Volodymyr Zelensky in which Trump lobbied Zelensky to investigate Biden, a chief political rival, and his son over unfounded corruption allegations is at the heart of the House’s impeachment efforts.

Democrats have pointed to a decision days before the call to block millions of dollars in U.S. military aid to Ukraine as evidence that Trump may have abused his power in leveraging the aid in an attempt to pressure Zelensky to agree to investigate the Bidens.

Trump has defended his request and the decision to block the aid, saying both were made to tackle corruption in Ukraine.

Zelensky said Thursday that he learned after the call that Trump had ordered the U.S. government to block the aid and that no mention of it came up during their conversation.

“We didn’t speak about this” during the July call, Zelenskiy said. “There was no blackmail.”

Democratic committee leaders have issued several subpoenas demanding records and testimony from the White House, Vice President Pence, the Office of Management and Budget, the Pentagon, Trump’s personal lawyer Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE and more as part of the investigation. However, the White House has ordered several officials to rebuff the demands.