Deirdre Shesgreen

USA TODAY

WASHINGTON – With only a month to go before the first votes are cast in the presidential primary, the 2016 White House race will lead the Sunday talk shows and the candidates will be popping up on nearly every channel.

The key points up for debate: Who on the Republican side has the momentum and organization to win in Iowa, which holds the first caucus Feb. 1? Will New Hampshire’s first-in-the-nation primary make-or-break it for former Florida Gov. Jeb Bush or New Jersey Gov. Chris Christie? What issues will drive the final stretch of the campaign?

Those questions will be front-and-center Sunday, along with a look-ahead to other top issues in the new year, including the battle against the Islamic State and the implementation of the nuclear agreement with Iran.

Here’s the Sunday lineup:

• CBS's Face the Nation: New York real estate mogul and GOP presidential contender Donald Trump; former CIA Deputy Director Michael Morell; former National Security Adviser to President Obama Tom Donilon.

• NBC's Meet the Press: Republican presidential candidates John Kasich, the governor of Ohio, and Rand Paul, a senator from Kentucky.

• ABC's This Week: Vermont Sen. Bernie Sanders, a Democratic presidential candidate; Ben Carson, a GOP candidate and retired pediatric neurosurgeon.

• Fox News Sunday: Bush and Christie.

• CNN's State of the Union: Sanders; Carly Fiorina, also a Republican presidential contender.

• WUSA9 Capital Download: A look back at the top 10 newsmaker moments in 2015 and political roundtable with Paul Singer, USA TODAY and Reid Wilson, Morning Consult.