WASHINGTON – Congressional Republicans spent Sunday morning defending President Donald Trump as news of a second whistleblower started to come out.

The second whistleblower has firsthand information to back up what's contained in the first complaint, according to his attorney.

The first complaint, a seven-page document released to the public on Sept. 26, helped spark an impeachment inquiry by revealing details of a call between Trump and Ukrainian President Volodymyr Zelensky in which Trump had pressured Zelensky to open an investigation into former Vice President Joe Biden's son Hunter Biden.

Rep. Chris Stewart, R-Utah, when asked on "Fox News Sunday" about the second whistleblower, said, "It does not matter."

"It does not matter. This person is going to come forward and say, yep the president had this phone call," said Stewart. "And yep, we have this transcript. Why should I care at all?"

Second whistleblower:Second whistleblower on Trump-Ukraine call, reportedly with firsthand knowledge, to come forward

Sen. Ron Johnson, R-Wisc., sparred with NBC's "Meet the Press" host Chuck Todd about Johnson's previous comments on Ukraine.

Todd asked Johnson why he said in an Oct. 4 Wall Street Journal interview that he had "winced" after being told about Trump's conditioning of aid to Ukraine on the opening of an investigation into the Biden family

"At that suggestion, I winced. My reaction was, 'Oh God. I don't wanna see those two things combined," he had told the Wall Street Journal at the time.

Todd and Johnson went back and forth over the issue, and Johnson did not elaborate on his previous comments, instead saying that Trump's presidency had been "sabotaged" says the day after his inauguration.

"You set this thing up totally biased," Johnson said to Todd.

Sen. Roy Blunt, R-Mo., a member of the Senate Intelligence Committee, when asked about it on CBS News' "Face the Nation" gave a more evenhanded response.

"I think it will be interesting to find out more about who that person is and what kind of contacts they had," he said.

Blunt said he planned on working with the Senate Intelligence Committee to "assemble all of the facts."

Sen. Lindsey Graham, R-S.C., responded to the news of the second whistleblower by comparing the situation to the controversy around Supreme Court Justice Brett Kavanaugh's nomination process.

"I’ve seen this movie before — with Brett #Kavanaugh. More and more doesn’t mean better or reliable," he wrote on Twitter.