According to the White House pool report, the president did not respond to questions shouted as he walked to the helicopter. He did wave to a small crowd nearby gathered for the takeoff.

While the president has yet to comment directly on the selection, Vice President Joe BidenJoseph (Joe) Robinette BidenOvernight Tech: FCC won't delay net neutrality vote | Google pulls YouTube from Amazon devices | Biden scolds social media firms over transparency Medicaid funds shouldn't be used to subsidize state taxes on health care Biden hits social media firms over lack of transparency MORE called the Wisconsin lawmaker earlier Saturday to congratulate him on his selection. 

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And Obama's campaign manager Jim Messina said in a statement Saturday that in picking Ryan, Romney had "rubber-stamped the reckless Bush economic policies that exploded our deficit and crashed our economy."

“In naming Congressman Paul RyanPaul Davis RyanMcConnell names Senate GOP tax conferees House Republican: 'I worry about both sides' of the aisle on DACA Overnight Health Care: 3.6M signed up for ObamaCare in first month | Ryan pledges 'entitlement reform' next year | Dems push for more money to fight opioids MORE, Mitt Romney has chosen a leader of the House Republicans who shares his commitment to the flawed theory that new budget-busting tax cuts for the wealthy, while placing greater burdens on the middle class and seniors, will somehow deliver a stronger economy," Messina said. "The architect of the radical Republican House budget, Ryan, like Romney, proposed an additional $250,000 tax cut for millionaires, and deep cuts in education from Head Start to college aid. His plan also would end Medicare as we know it by turning it into a voucher system, shifting thousands of dollars in health care costs to seniors."

From the White House, President Obama headed to Andrews Air Force Base, where he'll pick up a plane to Chicago. Obama does not currently have any other events on his public schedule Saturday, but will speak Sunday at a campaign event in Chicago. The president also plans to host a fundraiser at his Hyde Park family home Sunday night.