Frustrated with President Barack Obama’s reaction to Russian action in Ukraine, a group of Republican senators said Wednesday they will introduce legislation outlining a more muscular response. “What we’ve seen from the administration is a lot of rhetoric,” Sen. Bob Corker of Tennessee, the top Republican on the Foreign Relations Committee, said on the Senate floor Wednesday morning. The White House has been dealing “with the situation after something bad has already occurred,” he said. Earlier this week, violence flared up in another area of Ukraine that hugs the Russian border, as the new government in Kiev criticized local police...