With six months to go until Election Day 2006, are Republicans doomed to defeat? And what of President George W. Bush: If the Democrats win back the congressional majority, will they seek to investigate - even impeach - him? The answers to these two questions are linked. That is, Republican voters, angered, in particular, over Bush's shilly-shallying on the immigration issue, are inclined to let the GOP suffer a little in 2006. But they don't want to see the 2004 presidential election results overturned. After all, this is a conservative country; Republicans have won seven of the last 10 presidential...