President Trump is expected to order the construction of a border wall with Mexico in an executive order on Wednesday, according to the New York Times. An executive order to direct federal funds to cover the wall's construction is slated to be signed during an appearance by the president at the Department of Homeland Security on Wednesday, the New York Times reported, citing White House officials. He has claimed that the wall, a central promise of his campaign, is vital to keeping illegal immigrants out of the country. The executive order for the wall's financing is set to be signed Wednesday in tandem with another order issuing a temporary ban on refugees from Middle Eastern countries. Trump hinted at the news on Twitter on Tuesday night, writing, "Bid day planned on NATIONAL SECURITY tomorrow. Among many other things, we will build the wall!"