Marco Rubio Seeks Contrast With Hillary Clinton as He Announces Presidential Run

She's old news, the Florida Republican tells supporters ahead of his announcement rally.

Senator Marco Rubio, a Republican from Florida, exits after speaking during the Leadership Forum at the 144th National Rifle Association (NRA) Annual Meetings and Exhibits at the Music City Center in Nashville, Tennessee, U.S., on Friday, April 10, 2015.

Photographer: Daniel Acker/Bloomberg
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Hours before he was set to announce his 2016 presidential bid at a public rally on Monday, U.S. Senator Marco Rubio told his donors: I'm in, and Hillary Clinton is old news.

The Florida Republican confirmed his plans to seek the White House in a series of donor meetings on Monday, including breakfast with about 100 contributors at a Miami hotel and a call to other financial backers later in the morning, according to people with knowledge of his comments.