President Trump on Friday is expected to issue the first veto of his presidency, nixing legislation passed this week to block his declaration of a national emergency at the U.S.-Mexico border.

Senators voted Thursday 59-41 to pass the resolution of disapproval blocking Trump’s declaration. Twelve GOP senators broke rank and voted with all the Democrats.

The measure passed the House last month, 245-182.

The president is set to speak about his decision at 3:30 p.m.

Watch live in the video above.