In the weeks since Thompson emerged from the four-way GOP primary, Baldwin and her allies have hammered Thompson with negative television ads, focusing mostly on his post-gubernatorial work at a Washington, D.C. lobbying firm. Low on funds after the costly primary, Thompson's campaign has struggled to keep pace with Baldwin's television spending. The broadsides have taken a toll on the perceptions of Thompson in the state, according to the poll. Thirty-six percent of registered voters have a favorable opinion of Thompson, while 48 percent have an unfavorable view of the former four-term governor. In the Marquette poll conducted in the days following Thompson's Aug. 14 primary win, 40 percent of registered voters had a favorable view of Thompson, while 38 percent had an unfavorable view. Thompson isn't the only Republican with lagging favorability numbers in the state. Thirty-seven percent of registered voters have a favorable opinion of Romney, while 53 percent have an unfavorable view. Obama's numbers are much better: 56 percent have a favorable opinion, while 41 percent have an unfavorable opinion. Twenty percent of registered voters said they haven't heard enough about Baldwin, a 7-term congresswoman from Madison. Thirty-seven percent have a favorable view of the Democrat, while 39 percent have an unfavorable view. The Marquette Law School poll, conducted Sept. 27 through Sept. 30, surveyed 1,003 registered voters, for a margin of error of plus-or-minus 3.2 percentage points. The subsample of 894 likely voters has a margin of error of plus-or-minus 3.3 percentage points.