The WSJ reports Trump Looms Over Fight for Control of the Senate.

The fight for the Senate is being fought on a deep red, pro-Trump battlefield that is dramatically different from the suburban landscape where the House majority will be won and lost.

That is why Democrats' chances for erasing Republicans' narrow 51-49 Senate margin are longer than their prospects of winning the House majority, which would require them to flip 23 seats.

In recent weeks, the Senate map has shifted for both parties: Democrats are worrying more than expected about deep-blue New Jersey, where Sen. Bob Menendez—whose trial on federal corruption charges ended last fall in a hung jury—faces a well-funded GOP opponent, Bob Hugin.

Republicans are more concerned than anyone thought possible about Texas, where Sen. Ted Cruz's lead in polls over Democrat Rep. Beto O'Rourkeis narrowing.