Obama to discuss Islamic State threat on 'Meet the Press'

The Sunday talk shows will once again be dominated by discussion of the threat posed by Islamic State extremists in the Middle East and the continuing crisis in Ukraine.

President Obama will weigh in, making a rare appearance on NBC's Meet the Press.

Islamic State militants killed a second American journalist this week, putting pressure on Obama to expand airstrikes against the radical group into Syria. So far, the administration has limited the airstrikes to Iraq.

Meanwhile, the fighting in Ukraine's east between the Ukrainian government and Russian-backed separatists came to a halt on Friday as the two sides signed a cease-fire agreement. Obama expressed skepticism that the truce would hold and promised a new round of sanctions against Russia to pressure the nation to respect its neighbors' borders.

During a two-day NATO summit this week in Wales, the alliance announced the creation of a new rapid-response force to defend NATO members in Eastern Europe from the threat posed by Russia.

Here's the Sunday lineup:

• NBC's Meet the Press: The show's new moderator, Chuck Todd, will interview Obama about the Islamic State threat, the U.S. relationship with Russia and Ukraine, the Ebola virus outbreak in Africa, the November congressional elections and the president's decision to delay action on changing the immigration system. The show also will feature interviews with Pittsburgh Mayor Bill Peduto, Oklahoma City Mayor Mick Cornett, and Tacoma, Wash., Mayor Marilyn Strickland. They will discuss how mayors in some major cities are changing the way government works.

• CBS' Face the Nation: Sen. Marco Rubio, R-Fla., will talk about the Islamic State, Ukraine and other foreign policy issues. Rubio, a possible 2016 presidential candidate, sits on the Senate Foreign Relations Committee and the Select Committee on Intelligence. Rep. Dutch Ruppersberger, D-Md., the ranking member of the House Intelligence Committee, also will appear. Former secretary of State Henry Kissinger will discuss his new book World Order, which talks about the quest for nations to find a way to live together.

• ABC's This Week: Sen. Ted Cruz, R-Texas, will criticize Obama's military response to the Islamic State. Cruz serves on the Senate Armed Services Committee and is a potential 2016 presidential candidate. Also speaking about militant group and its terror threat will be Rep. Peter King, R-N.Y., who serves on the House Intelligence Committee and Homeland Security Committee, and Rep. Adam Smith, D-Wash., the ranking member of the House Armed Services Committee. Interior Secretary Sally Jewel will speak about the 50th anniversary of the Wilderness Act.

• CNN's State of the Union: Sen. Dianne Feinstein, D-Calif., chairman of the Senate Intelligence Committee, and Rep. Mike Rogers, R-Mich., chairman of the House Intelligence Committee, will discuss whether the Islamic State could attack the United States.

• Fox News Sunday: Former Massachusetts governor Mitt Romney, the 2012 Republican nominee for president, will discuss the November congressional elections and the state of the Republican Party.