U.S. President Donald Trump pledged Wednesday in Dallas to give every American adult $5,000 if Republicans keep control of the House and Senate in the midterm elections. He called the proposal the Trump Dividend and said it would be tied to GOP victory. The plan would need congressional approval and could cost more than $1 trillion, adding to deficit and inflation concerns.

U.S. President Donald Trump speaks at the Republican convention, Sept. 9, in Dallas. AP-Yonhap

U.S. President Donald Trump pledged Wednesday to send every American adult $5,000 if Republicans retain control of the House and Senate in the midterm elections, an extraordinary gambit to reverse his party's sagging fortunes in November.

The dubious promise would likely cost more than $1 trillion and require congressional approval, and would further exacerbate the country’s nearly $1.8 trillion annual budget deficit and concerns about inflation.

“If the Republicans win, you win with us and you get $5,000," Trump said during the GOP's midterm convention in Dallas. "I will be called the Trump Dividend.”