Eric Cantor is expected to announce his plan to resign as House majority leader today, probably at a meeting of all House Republicans. Cantor lost the GOP primary to David Brat, a little-known college professor, in Virginia’s Seventh Congressional District on Tuesday.

His loss to Brat and his decision to step down as majority leader mark an abrupt halt to Cantor’s rise as a Republican leader and political star. Cantor had previously been regarded as a strong candidate to replace House speaker John Boehner should he resign next year.