U.S. Senator John Cornyn joined with a growing list of Republican lawmakers who have called for House and Senate Intelligence Committees to investigate ties between Russia and President Donald Trump along with his administration. Republican lawmakers also want to hear from General Michael Flynn who resigned Monday night after just 24 days on the job as President Trump's National Security Adviser.

When pressed by the Dallas Morning News, Cornyn said he thought it would be "appropriate" for Flynn to testify.

But asked if he supported calls for Flynn to appear before the Senate Intelligence committee, he said an investigation in both the Senate and House “would be the appropriate way to proceed.”

Pressed if Flynn should testify, Cornyn told The Dallas Morning News: “That would certainly be an option.”

According to CNN, other Republican Senators who support an investigation so far include Sen. Lindsey Graham and Senator Roy Blunt.

Senator Ted Cruz was non-committal on whether Flynn should testify according to the Dallas Morning News.

"General Flynn is a good man who has many decades of service defending this nation," Cruz said after speaking to a San Antonio group in Washington. "The situation that has unfolded is unfortunate, but I think the central concern should be ensuring that we have in place a strong, serious national security team that is prepared and committed to defending this nation."

Flynn resigned Monday night after mounting pressure from the post after reports surfaced that he lied to Vice President Mike Pence about the nature of a phone call Flynn made to a Russian official before Trump took office.

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