A GOP senator slammed President Trump on Wednesday night for his repeated threats to revoke the licenses of television networks over negative coverage.

Nebraska Sen. Ben Sasse questioned whether Trump was upholding his presidential oath to protect the constitution by making the threats on the media.

“Mr. President: Words spoken by the President of the United States matter,” Sasse said in a statement.

“Are you tonight recanting of the oath you took on January 20th to preserve , protect, and defend the First Amendment?”

The statement caused reaction from former presidential candidate Jeb Bush who retweeted the remarks in a show of support.

Trump had tweeted earlier on Wednesday night “Network news has become so partisan, distorted and fake that licenses must be challenged and, if appropriate, revoked.”

His missive came after he vehemently denied an NBC News report that he asked to dramatically expand the US nuclear arsenal.