Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE (R-Ky.) said he was not provided an explanation for why the Trump administration held up aid to Ukraine when he pressed senior officials on the matter over the summer.

"I was not given an explanation," McConnell told reporters Tuesday as the congressional furor grew over 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’s interactions with Ukrainian President Volodymyr Zelensky.

ADVERTISEMENT

McConnell said he spoke to Secretary of Defense Mark Esper Mark EsperOvernight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Overnight 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 MORE and Secretary of State Mike Pompeo Michael (Mike) Richard PompeoWatchdog confirms State Dept. canceled award for journalist who criticized Trump Trump's push for win with Sudan amps up pressure on Congress Putin nominated for Nobel Peace Prize MORE twice about the matter without receiving clarification for the delay in $391 million in aid to Ukraine.

“I was very actively involved in advocating [for] the aid. I talked to the secretary of Defense, the secretary of State once,” he said.

“The good news was it finally happened,” he added, noting the administration finally released the aid. “I have no idea what precipitated the delay.”

Media outlets reported Tuesday that Trump asked his acting 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 July to put a hold on the aid before a phone call with Zelensky in which Trump suggested Ukraine conduct an investigation of Democratic presidential candidate and 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 or Biden’s son, Hunter Biden.

House Democrats are considering voting on articles of impeachment in response to the reports, which were spurred by an intelligence community whistleblower.

McConnell said the matter should be handled by the Senate Intelligence Committee and noted that acting Director of National Intelligence Joseph Maguire is scheduled to appear before the panel Thursday.