Several elections on Tuesday will be a crucial test of the popularity of the chaotic and extremist first two months of Donald Trump’s second term and the clout of his close ally, Elon Musk, the world’s richest man who has been tasked with radically reforming the US federal government.

They could also offer a glimmer of hope to Democrats – fresh off a surprise upset win in a local race in Pennsylvania last week – that their divided political party could be seeing a resurgence in its fortunes. Or, if they fail to land further blows on Republicans, it will be yet another sign that the party is destined for a long period in the wilderness amid historic lows of its popularity in recent polls.

Many eyes are focused on two previously Republican-held congressional seats in Florida, where its sixth and first congressional districts are vacant and up for grabs. Mike Waltz left to take up a cabinet job for Trump and Matt Gaetz resigned to pursue a failed bid to become attorney general.