The slayings of 10 aid workers in Afghanistan by the Taliban are a stark reminder of what could happen without American involvement there, U.S. Sen. John McCain said. McCain stumped Sunday at Mesa State College for Grand Junction native Jane Norton, urging about 150 people to get out the vote in the Republican primary election. Norton faces Weld County District Attorney Ken Buck in the GOP primary for the U.S. Senate, and the winner will face the victor in the Democratic Party primary pitting Sen. Michael Bennet against former Colorado House Speaker Andrew Romanoff. (snip) McCain, the 2008 Republican presidential...