Bernie Sanders is preparing to hit the campaign trail full-time for Hillary Clinton after the Senate recesses, but in the meantime he has a message for his supporters.

Before holding a rally in Ohio over the weekend, Sanders was firm.

"This is not the time for a protest vote, in terms of a presidential campaign," Sanders said. "I ran as a third-party candidate. I'm the longest-serving independent in the history of the United States Congress. I know more about third-party politics than anyone else in the Congress, okay? And if people want to run as third-party candidates, God bless them! Run for Congress. Run for governor. Run for state legislature. When we're talking about president of the United States, in my own personal view, this is not time for a protest vote. This is time to elect Hillary Clinton and then work after the election to mobilize millions of people to make sure she can be the most progressive president she can be."

Thank you, Senator Sanders.