WATCH LIVE: President Trump speaks to the Major County Sheriffs Joint Conference

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WATCH LIVE: Senate impeachment trial of Donald Trump | January 28

WATCH: Trump declares national emergency to build border wall

Trump declares 'national emergency' to fund border wall, full announcement

Perpetual Motion From Negative Mass?

WATCH LIVE: House Homeland Security Committee holds a hearing on election security

WATCH: The Russians 'are living rent-free in our heads,' Homeland Security offical says

WATCH LIVE: Senators Schumer, Wyden and Reed address the press ahead of impeachment trial

President Trump declares national emergency over border crisis: full speech February 15, 2019

Watch President-elect Donald Trump speak from Carrier plant

President Trump says he will declare a national emergency