To the Editor:

Re “G.O.P. Senators Pursuing Author of File on Trump” (front page, Jan. 6): Instead of putting party over country in an attempt to discredit a government source and longtime intelligence ally in Christopher Steele, a former British agent, Senators Lindsey Graham and Charles Grassley would serve their judicial oversight roles and the American public better by working with their colleagues to investigate the Russian attack on our political system.

Since Mr. Steele did bring the findings of his research to the F.B.I. because he was concerned that Kremlin interference was a threat to our election, senators serious about judicial oversight should be grateful for his information, not referring him to the Justice Department for criminal investigation.

After all, had any of the members of Mr. Trump’s campaign gone to the F.B.I. when they first discovered that the Kremlin wanted to help Mr. Trump win the election, our country might not be in this mess now.

JANE RUPERT, HUNTINGTON, N.Y.