Elon Musk is seeking a repeat of the political victory he scored with President Donald Trump by deploying millions of dollars into what has become the most expensive judicial race in US history.

Musk, the world’s richest person, is running the same playbook that helped propel Trump to the White House last year in a race to fill an open seat on Wisconsin’s Supreme Court. Voters on Tuesday will decide whether to tip the balance of the state’s highest court to conservatives, away from the left-leaning judges who currently hold a majority.