California's high school track-and-field state championships starting Friday are set to be the testing ground for a new participation and medaling policy for competitions that include transgender athletes.

President Donald Trump on Tuesday threatened to withhold federal funding from California over a transgender athlete’s participation in an upcoming sporting event — the latest example of the president trying to use funding as leverage to enact his agenda.

California is opening up its track-and-field championship to more girls after a transgender athlete drew controversy for qualifying for the meet