In a letter to President Barack Obama, Senate republicans demanded full compliance from the administration in the Internal Revenue Service investigation.

The congressional investigation is looking into how the IRS targeted conservative groups.
Senator Bob Corker was among numerous Senators to sign the letter. In it, they outlined concerns regarding conflicting responses from the nonpartisan agency and said it is imperative the administration work with Congress to restore public confidence.

"The American people deserve to know what actions will be taken to ensure those who made these policy decisions at the IRS are being held fully accountable and more importantly what is being done to ensure that this kind of raw partisanship is fully eliminated from these critically important non-partisan government functions," wrote the senators. "As such, we demand that your Administration comply with all requests related to Congressional inquiries without any delay, including making available all IRS employees involved in designing and implementing these prohibited political screenings, so that the public has a full accounting of these actions. It is imperative that the Administration be fully forthcoming to ensure that we begin to restore the confidence of our fellow citizens after this blatant violation of their trust. We look forward to working on this critical issue with the Administration's full cooperation."

The letter has 45 signatures including Tennessee senators Lamar Alexander and Bob Corker and Georgia senators Saxby by Chambliss and Johnny Isakson.

"The First Amendment protects the rights of the American people to organize and speak up and speak out, and the IRS has violated those rights by creating what sounds like an enemies list to keep people quiet," Alexander said.

Read the full letter to President Obama here.