Mitt Romney will announce his running mate Saturday in Norfolk, Va., his campaign said late Friday night.

"On Saturday, Mitt Romney will begin his “The Romney Plan For A Stronger Middle Class” bus tour by announcing his choice for Vice Presidential candidate in Norfolk, Virginia," read the statement from the campaign.

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The announcement will be made on the USS Wisconsin around 9 a.m. 

Media outlets reported late Friday night that Romney is poised to pick House Budget Committee Chairman Paul RyanPaul Davis RyanDemocrats hit Scalia over LGBTQ rights Three-way clash set to dominate Democratic debate Krystal Ball touts Sanders odds in Texas MORE (R-Wis.). A Republican source told The Hill that Romney has tapped Ryan, but the Romney campaign did not confirm the choice.

A Ryan pick would be embraced by the GOP base, as well as liberals. Democrats have repeatedly criticized Ryan's controversial budget and his proposed reforms to the Medicare system.

Romney, 42, is serving his seventh term. As Romney's running mate, Ryan will not only have to defend his budget, but he will also likely be pressed on his vote for the Wall Street bailout in 2008 and his opposition to the DREAM Act in 2010.

The presumptive GOP presidential nominee is beginning a four-day bus tour through Virginia, North Carolina, Florida and Ohio.

Some possible vice presidential choices — including Sens. Rob PortmanRobert (Rob) Jones PortmanCost for last three government shutdowns estimated at billion The Hill's Morning Report - Trump takes 2020 roadshow to New Mexico The 13 Republicans needed to pass gun-control legislation MORE (R-Ohio) and Marco RubioMarco Antonio RubioLiberal super PAC launches browser extension replacing 'Mitch McConnell' with 'Moscow Mitch' Trump faces difficult balancing act with reelection campaign Republicans wary of US action on Iran MORE (R-Fla.) — are scheduled to join Romney at various stops on the tour.

Other names mentioned for the running mate spot include former Minnesota Gov. Tim Pawlenty and Virginia Gov. Bob McDonnell.

Pawlenty and his wife, Mary, are scheduled to campaign for Romney in Manchester, N.H., on Saturday, per an announcement put out earlier Friday by the Romney campaign. Pawlenty is scheduled to appear on NBC's "Meet the Press" and ABC's "This Week" on Sunday.

— Bob Cusack contributed to this report.

— Updated at 1:51 a.m.