"Only one candidate in the general election came to speak to you, and that candidate is now the president of the United States, standing before you, again," Trump said. "I have a feeling that in the next election, you're going to be swamped with candidates, but you're not going to be wasting your time. You'll have plenty of those Democrats coming over, and you're going to say, ‘No sir. No thank you. No ma'am, perhaps ma'am," he said, taking a jab a Massachusetts Senator Elizabeth Warren, who many believe could run as a Democratic presidential challenger in 2020.