Obama to Walker: 'Bone up on foreign policy'

President Obama is weighing in on the 2016 Republican presidential race, mocking Scott Walker for saying he would revoke any Iran nuclear agreement if he makes it to the White House.

"It would be a foolish approach to take," Obama told NPR News. "And perhaps Mr. Walker -- after he's taken some time to bone up on foreign policy -- will feel the same way."

Walker, the governor of Wisconsin, has echoed many Republicans in questioning whether Iran would give up the means to make nuclear weapons in exchange for a reduction of sanctions, the key to the proposed deal.

Responding to the president's comments, Walker said in a statement that Obama's "failed leadership has put him at odds with many across the country, including members of his own party, and key allies around the world."

The United States "would be better served by a president who spent more time working with governors and members of Congress rather than attacking them," Walker said. "Whether it is cutting a bad deal with Iran, calling ISIS the JV squad, or touting Yemen as a success story, Obama’s lack of leadership has hurt America’s safety and standing in the world.”

Saying that an Iran agreement would trigger an arms race throughout the Middle East, Walker recently told radio host Hugh Hewitt he would rescind any deal "on day one."

In his NPR interview, Obama said he is confident that the next president "will be knowledgeable enough about foreign policy and knowledgeable enough about the traditions and precedents of presidential power that they won't start calling (into) question the capacity of the executive branch of the United States to enter into agreements with other countries."

"If that starts being questioned," Obama said, "that's going to be a problem for our friends and that's going to embolden our enemies."