The Wisconsin Senate race has shifted from “lean Democratic” to “toss-up” in the latest rating change from Cook Political Report, dealing a blow to Democrats as they seek to hold on to their slim majority in the upper chamber.

The Senate race in Wisconsin is being shifted to a "Toss Up," signifying Democrats losing ground in the crucial state.

Sources say campaign-funded polls show Democratic U.S. Sen. Tammy Baldwin is up only 2 percentage points over GOP businessman Eric Hovde.

The Cook Political Report on Tuesday shifted the Wisconsin Senate race from “lean Democrat” to “toss up,” handing Republican Eric Hovde a boost as he tries to unseat Sen. Tammy Baldwin (D-Wis.). Baldwin,