Sen. Mitt Romney said Friday he may never be ready to endorse President Donald Trump's re-election, but wouldn't give the race's Democratic front-runner, Joe Biden, "more than a 50-50 shot" of winning the White House. "I think the attitude here has got to be the same as across the country, which is the president will surely be the Republican nominee and an incumbent in a growing economy is more likely to win than to lose. But it's not a sure thing," he said. Romney said if the Democrats nominate "a strong contender, anything's possible." But he declined to say whether...