TIME:

Donald Trump’s announcement that he no longer stands by a pledge to support the GOP has thrown his hold on South Carolina’s 50 delegates in doubt.

The Palmetto State was one of several that required candidates to pledge their loyalty to the party’s eventual nominee in order to secure a slot on the primary ballot. Though Trump won all of the state’s delegates in the Feb. 20 primary, anti-Trump forces are plotting to contest their binding to Trump because of his threat on the pledge Tuesday.