Watch live: Trump expected to issue first veto over national emergency declaration

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.