Johnson: I'm writing a letter to 'lay out what I know' about Ukraine aid

Sen. Ron JohnsonRonald (Ron) Harold JohnsonRemembering Tom Coburn's quiet persistence Coronavirus pushes GOP's Biden-Burisma probe to back burner GOP seeks up to 0 billion to maximize financial help to airlines, other impacted industries MORE (R-Wis.), a member of the Senate Foreign Relations Committee, said he will lay out in a letter his telling of events related to the foreign aid to Ukraine that was held up and is now a central part of the impeachment inquiry.

"I got a letter last night from Reps. [Jim] Jordan [R-Ohio] and [Devin] Nunes [R-Calif.] asking for, basically, my telling of events. I'll be working on that today. I will lay out what I know," Johnson said Sunday on NBC's "Meet the Press." 

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He said he won't be called to testify, but he will reply to his GOP colleagues' request to tell his version of what happened, "which is difficult to do in eight or 10 minutes on a show like this."

Johnson defended President TrumpDonald John TrumpCDC updates website to remove dosage guidance on drug touted by Trump Trump says he'd like economy to reopen 'with a big bang' but acknowledges it may be limited Graham backs Trump, vows no money for WHO in next funding bill MORE and said Trump did not push Ukraine to publicly announce investigations before supplying the aid. 

Johnson said Trump "completely denied there is any kind of arrangement that Ukraine had to do something before he released that funding" when he spoke with him in August.

Johnson and Sen. Chris MurphyChristopher (Chris) Scott MurphyCoronavirus watch: Where the virus is spiking across the country New Jersey governor closing parks, forests Democrats seize on Trump's firing of intelligence community watchdog MORE (D-Conn.) were the bipartisan Senate team charged with delivering aid to Ukraine. 

Murphy told NBC's Chuck ToddCharles (Chuck) David ToddArkansas governor: 'I'd like to see a better way' to procure medical equipment US emergency room doctor dies after coronavirus symptoms Biden on quarantine timelines: 'Worst thing you can do is raise expectations and then watch them get dashed' MORE that Ukrainian President Volodymyr Zelensky knew the aide was suspended on Sept. 5. At that time, Murphy said he didn't know of "all these back channels that were happening regarding this extortion campaign." 

"The president was trying to use the power of his office to influence the upcoming election," Murphy said.