President Trump finishes his Twitter thought three hours later

USA TODAY's Susan Page asks a panel of White House veterans and presidential scholars to offer President Trump advice after his first 100 days in the White House. USA TODAY

President Trump tweeted Monday morning about why building "The Wall" along the U.S.-Mexico border was necessary. But he left his followers in suspense.

"The Wall is a very important tool in stopping drugs from pouring into our country and poisoning our youth (and many others)! If," read the tweet, sent at 8:28 a.m.