“It’s important for us to avoid thinking politically, as Republicans or Democrats, and instead to think patriotically as Americans,” Mr. Rosenstein said. “Our response must not depend on which side was victimized.”
Mr. Sasse echoed that sentiment.
“The U.S. intelligence community knows that the Russian government attacked the U.S.,” Mr. Sasse said. “This is not a Republican or a Democrat view — it is simply the reality. All patriotic Americans should understand that Putin is not America’s friend, and he is not the president’s buddy. We should stand united against Putin’s past and planned future attacks against us.”
But with the exception of Mr. McCain, Republicans steered clear of discussing whether Mr. Trump should cancel Monday’s meeting in Helsinki. Senator Mitch McConnell, Republican of Kentucky and the majority leader, did not have any immediate reaction, while a spokeswoman for Speaker Paul D. Ryan of Wisconsin said simply that Mr. Ryan was “glad these hackers are being held to account.”
Representative Jim Jordan, Republican of Ohio, a founder of the conservative House Freedom Caucus, asked if Mr. Trump should demand extradition of the hackers, said, “I’ll leave that to the president.” Mr. Jordan said the president has already “been clear he is going to ask Mr. Putin some tough questions.”
The chairman of the House Oversight and Government Reform Committee, Representative Trey Gowdy, Republican of South Carolina, said he intends to hold a hearing on election security at the end of July. But asked if Mr. Trump should recalibrate his approach to the Putin meeting, Mr. Gowdy said, “That’s above my pay grade.”
But Mr. Royce, of California, called Friday for Mr. Trump to “use today’s indictments to challenge” Mr. Putin at Monday’s summit meeting, adding, “We can’t afford to give an inch of ground in defending democracy.”