Senator Susan Collins won re-election to a second term.

Pingree attacked Collins for supporting the Bush tax cuts.

[2] However, Collins then supported the congressional resolution to attack Iraq, while Pingree opposed it.

[3] Collins, a popular moderate, was supported by health care groups, environmentalists and gay rights advocates.

She handily defeated Pingree in one of the first U.S. Senate elections in which both major parties nominated women in U.S.