On NBC's "Meet the Press": Mitt Romney
On "Fox News Sunday": Glenn Hubbard, an economic adviser to the Romney campaign, Austan Goolsbie, former chairman of the White House Council of Economic Advisers and Republican House candidate Mia Love of Utah.
On CNN's "State of the Union": California Gov. Jerry Brown and Newt Gingrich.
On ABC's "This Week": Paul Ryan.
On CBS' "Face the Nation": Excerpts from a CBS interview with President Obama, Paul Ryan and White House adviser David Plouffe.