Two special elections in the US are racking up quite the price tag.  

Voters are heading to the polls in two special elections in Florida and Wisconsin. 

Florida's holding special elections for Matt Gaetz and Mike Waltz's congressional seats, and both seats are critical races for Republicans, given their slim majority in the House. 

The battleground state of Wisconsin is also voting on a new judge for the state's top court. 

It's become the most expensive judicial contest in US history, with more than $90 million being spent on campaigning, including $21 million by Elon Musk. 

US Correspondent Richard Arnold told Mike Hosking that Musk has been accused of trying to buy the election. 

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