Rep. Tammy Baldwin (D-WI) leads Tommy Thompson by 4 points in Wisconsin's Senate race, according to a poll released Thursday night.
The poll, from NBC News, Marist College and the Wall Street Journal, shows Baldwin leading Thompson among likely Badger State voters 49 percent to 45 percent. Those results diverge from a poll released earlier this week from Marquette University Law School that showed Thompson, the state's former governor, edging Baldwin by a point.
After trailing for much of the summer, Baldwin surged past Thompson in most polls during the month of September. The PollTracker Average currently shows Baldwin maintaining the lead she built last month to hold a slim advantage over Thompson.