Public comments from President Trump blaming Ukrainian President Volodymyr Zelensky for Russia’s invasion of his country are unnerving Senate Republicans, who have largely sought to avoid conflicts with the White House. Trump’s escalating war of words with the Ukrainian leader comes as hawks in both parties plead with the president not to give Moscow a free pass in talks to end the bitter three-year conflict. “I’m concerned with anything that would ultimately allow there to be a moral equivalency between Zelensky and Putin,” said Sen. Thom Tillis (R-N.C.), who visited Ukraine alongside a pair of Senate Democrats over the weekend...