When asked if he would support Trump if he was the nominee, an exasperated Rubio struggled to answer the question.
— MSNBC (@MSNBC) March 12, 2016
“I don’t know,” Rubio said. “I already talked about the fact that I think Hillary Clinton would be terrible for this country. The fact that you’re even asking me that question, um, I still at this moment intend to support the Republican nominee. But, getting harder every day.”
Update 11:41am CT, March 12: Rubio apparently waffled when asked again about the possibility of backing Trump.
Screengrab via MSNBC