WASHINGTON -- Sen. Harry Reid will command the biggest party majority of any Senate leader in a quarter century when the new Congress convenes in January. But the Nevada Democrat is already worried about his own re-election fight in 2010.

Sen. Reid, perhaps the most-vulnerable Democrat who will face re-election in a midterm race that is likely to favor his party once again, began interviewing campaign managers last week. The Senate majority leader also recently stepped up fund-raising.

Starting...