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 RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates 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 PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (R-Ohio) and Marco RubioMarco Antonio RubioMurky TikTok deal raises questions about China's role Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic 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.