Wisconsin's Senate Race Is Close

Baldwin leads Thompson by four points

MADISON, Wis. -- The contentious race for the U.S. Senate between former Republican governor Tommy Thompson and Democratic Rep. Tammy Baldwin is growing even more intense in its final days, reflecting the closeness of the contest and its importance.

A Marquette University Law School poll released Wednesday showed Baldwin leading Thompson, 47%-43%. The same poll showed President Obama leading Republican Mitt Romney in Wisconsin, 51% to 43%. The poll of 1,243 likely voters had an error margin of +/-2.8 percentage points.