Trump tweets 'we will build the wall'

WASHINGTON — President Trump will announce plans for a Mexican border wall on Wednesday, addressing a key campaign promise on the sixth day of his presidency.

Trump himself tweeted out the news, writing, "Big day planned on NATIONAL SECURITY tomorrow. Among many other things, we will build the wall!"

Trump’s border wall: Could he really do it?

Yes, Trump will have broad power to crack down on immigration

Trump can punish 'sanctuary cities' that protect undocumented immigrants

Prep for the polls: See who is running for president and compare where they stand on key issues in our Voter Guide

How Trump can ramp up deportations

The White House said the president will visit the headquarters of the Department of Homeland Security Wednesday afternoon, but gave no specifics other than that there would be a photo opportunity.

Trump aides have made clear that there's been no change in Trump's position on the border wall, and he's getting right to work on it. Unlike some of his other first-week actions — like pushing pipeline projects and reinstating the Mexico City policy on global funding of abortion groups — Trump needs congressional support to authorize a border wall.

"The president has noted that this was a serious priority of his throughout the campaign," White House Press Secretary Sean Spicer said Monday. "He has already started to work with congress on the appropriations avenue of that. And so he is doing everything he can to direct agencies and congress to commence with that work as soon as possible."

The wall is just one component of a Trump immigration policy that could also include other executive orders, rolling back President Obama's deferred deportation programs and instituting what he has called "extreme vetting" of immigrants from Muslim countries.