Elon Musk's expected hosting of Alice Weidel, leader of the far-right Alternative for Germany (AfD) party, for a discussion on his X platform on Thursday was being watched by the European Commission to check for any spreading of misinformation before next month's German election.

Political leaders have shunned the Alternative for Germany. But on his social media platform X, Mr. Musk is pitching the party as mainstream.

The publicity was a potential boon for AfD, which has been frozen out of mainstream politics, in part, because its leaders have downplayed Nazi atrocities.