Trump used his preferred "Crooked Hillary" nickname to mock Clinton in the tweet, saying if she didn't "close the deal" she should leave the race:
Do you think Crooked Hillary will finally close the deal? If she can't win Kentucky, she should drop out of race. System rigged!
— Donald J. Trump (@realDonaldTrump) May 17, 2016
At the time of Trump's tweet, the Kentucky primary results were still too close to call.
It's not the first time Trump has offer his unsolicited thoughts on the Democratic race, either. Last week, he encouraged Sen. Bernie Sanders (I-VT) to run as a third-party candidate:
Bernie Sanders is being treated very badly by the Dems. The system is rigged against him. He should run as an independent! Run Bernie, run.
— Donald J. Trump (@realDonaldTrump) May 16, 2016