U.S. Sen. John McCain said it’s too early to know whether Republicans will seize control of Congress this fall or if voters will retire President Barack Obama after one term. But the 2008 Republican presidential nominee said the federal spending excesses of his own party turned too many fiscal conservatives into independent voters. “A lot of voters are becoming independents,” McCain, a two-time New Hampshire presidential primary winner, said Friday. “We blew a lot of opportunity during the Bush years in failing to show that we were fiscally responsible.“We paid a price for it, and still haven’t been able to...