2. The 5 bellwethers of a GOP wave election
Here are five of the most hotly contested congressional races that political insiders are watching closely to determine whether Democrats will beat expectations on Nov. 8, or whether a red wave could reemerge just before Election Day.
Between the lines: If these seats stay or turn red, Republicans can pop the champagne corks early. But if Democrats hold their ground on friendly turf, it's a sign that any Republican wave has turned into a ripple.