(CNN) - Republican Sen. Marco Rubio of Florida will deliver what his staff bills a "major speech on the future of U.S. foreign policy" this week, the senator's office announced Monday.
Rubio, considered to be a top vice presidential pick for likely GOP nominee Mitt Romney, is set to speak Wednesday at The Brookings Institution, a left-leaning think tank in Washington, D.C.
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His remarks will focus on "whether U.S. global leadership is sustainable and even necessary in the 21st Century," his staff said in a statement, without releasing further details.
While Rubio has consistently beat back the increasing "veep" chatter, the upcoming speech marks another high-profile move for the junior senator, who's also drafting major immigration legislation and getting ready to release a memoir this summer.
Rubio appeared on the campaign trail for the first time with Romney on Monday, participating in a press conference with the candidate and taking the stage for a town hall in Aston, Pennsylvania.
- CNN's Martina Stewart and Ashley Killough contributed to this report.