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 BidenDems ponder gender politics of 2020 nominee Trump: Why didn't Obama 'do something about Russian meddling?' 2020 Dem contenders travel to key primary states 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 RyanRepublicans are avoiding gun talks as election looms The Hill's 12:30 Report Flake to try to force vote on DACA stopgap plan 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.