Republicans defended two House seats in Florida while both parties hoped to win a coveted seat on the Wisconsin Supreme Court.

Following the most expensive judicial election in US history, Susan Crawford defeated her conservative rival Brad Schimel. Crawford's victory keeps intact the 4-3 liberal control of Wisconsin's highest court.

Democrat-backed Susan Crawford won the closely-watched Wisconsin Supreme Court race, the most expensive judicial election in U.S. history.

Susan Crawford, who led legal fights to protect union power and abortion rights and to oppose voter ID, defeated Republican-backed Brad Schimel in a race that became a proxy fight for the nation’s political battles.

Elon Musk’s candidate faced a resounding loss in a Wisconsin judicial race despite the world’s richest man pouring millions into the campaign, while Republicans avoided upsets in two critical US House seats in Donald Trump’s home state of Florida.

The Wisconsin Supreme Court currently has a 4-3 liberal majority, with one of the liberal justices retiring, the balance of the court is at stake.

The country's most expensive court race has high stakes for the state and could test the popularity of the Trump administration in its early days.

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A Marquette University Law School poll taken in late February also found that a majority of registered voters in Wisconsin support photo ID for voting, and separately, a majority of registered voters in Wisconsin said they would support the ballot initiative.