Among incumbents facing close reelection bids in the Senate are Minority Leader Mitch McConnell of Kentucky and Senator Ted Stevens of Alaska, who was found guilty of corruption charges last month.

• 在参议院，少数党领袖麦康奈尔以及来自阿拉斯加州的史蒂文斯参议员是否能重新当选还难以判断。史蒂文斯上个月被判受贿罪罪名成立。