India, Dec. 17 -- President Donald Trump will address the nation on Wednesday night during prime-time television in a highly anticipated speech that is being closely watched amid the 79-year-old's falling popularity among voters.

The all-important announcement will begin at 9:00 p.m. ET at the Diplomatic Reception Room inside the Oval Office, according to the president's Wednesday schedule on the official White House press pool website. The President's day started at 10:30 a.m. as he left from Joint Base Andrews in Maryland for Dover Air Force Base in Delaware. He will attend a ceremony honoring the two members of the Iowa National Guard killed in Syria at 1:30 p.m.

The President has no other media interaction planned for Wednesday, and...