The Wisconsin race that could tip the Democratic majority in the US Senate

Tammy Baldwin faces a race in November that will test the rural-urban coalition the Democratic Wisconsin senator has built and help determine whether Democrats will be able to hold onto their narrow majority in the US senate.

Baldwin faces Eric Hovde, a real estate mogul and banker, who has campaigned on popular Republican issues like immigration and the economy, while linking Baldwin to Joe Biden.

Baldwin, who was first elected in 2012 on a tide of progressive support, is one of 23 Democratic US senators up for re-election this year; her ability to keep the support of voters in purple and red districts could determine the outcome of the critical race.

For Hovde to win the seat, he will have to erode that support and hope for high turnout outside heavily Democratic areas like Milwaukee and Dane county, which have generated historic voter turnout in recent elections.

Baldwin has focused much of her campaign messaging on the fact that with a net worth of more than $195m, Hovde would be among the wealthiest members of the Senate if elected.

In recent political ads, Hovde has highlighted his diagnosis of multiple sclerosis and the numerous international charities he operates to offer a more personal side and present his wealth as a political asset.

But he handles the topic of his finances sometimes uncomfortably. In numerous talk radio interviews, Hovde, who has slammed the Democrats for persistently inflated consumer prices, acknowledged that inflation could be good for a wealthy businessman like himself.

The impact of the shakeup at the top of the Democratic party ticket in July also quickly led to a deluge of funding for Democrats, including in Wisconsin.