Arizona Senate Race

It's the first time both major-party candidates are declining post-Watergate federal campaign financing — and the spending limits attached.

WASHINGTON In the risky business of running for president, Barack Obama and Mitt Romney are largely playing it safe.

"Platts Energy Week" (WUSA at 8 a.m.) interviews Sen. Mark Udall (D-Colo.), Deputy Assistant Secretary of the Army-Energy Richard G. Kidd IV and Deputy Assistant Secretary of the Navy for Energy Thomas W. Hicks; "BioCentury This Week" (WUSA at 8:30) features ISI Group's Mark Schoenbaum and Johns Hopkins University's Thomas Smith; "Ideas in Action with Jim Glassman" (MPT at 8:30, 9:30 on WHUT) has author Joseph Nye and Brookings Institution's Robert Kagan; "Fox News Sunday" (Fox at 9) hosts Sen. John McCain (R-Ariz.) and Archbishop of Washington Cardinal Donald Wuerl; "White House Chronicle" (WETA at 9) has George Washington University's Amitai Etzioni; "State of the Union" (CNN at 9) features former New York City mayor Rudy Giuliani, Rep. Debbie Wasserman Schultz (D-Fla.), Gen. Peter Chiarelli, Sen. Patty Murray (D-Wash.) and others; "The Chris Matthews Show" (NBC at 10) hosts Time's Joe Klein, New York Times's Helene Cooper, National Journal's Major Garrett and Associated Press's Kasie Hunt.

The battle between President Barack Obama and Republican Mitt Romney will be the most expensive presidential contest ever — by a long shot.

Presumed Republican presidential nominee Mitt Romney will be joined in San Diego Monday by the party's 2008 nominee, Sen. John McCain , at what is billed as a Memorial Day Tribute at the Veterans Museum and Memorial Center.