Secretary of State John KerryJohn Forbes Kerry2020 Dem contenders travel to key primary states When it comes to Colombia, America is in a tough spot 36 people who could challenge Trump in 2020 MORE will appear on all five Sunday shows as worries about the Russian-Ukraine standoff and Israel's ground offensive in Gaza dominate headlines.

The two issues represent different challenges for Kerry, who is also likely to be asked about the decision to extend talks on curbing Iran's nuclear program. That decision would have dominated the news most weeks, but was released late in the day Friday and was overshadowed by the events in Gaza and Ukraine.

The Obama administration is pressing Russia and separatists in Ukraine to allow international investigators free access to the crash site of Malaysia Airlines Flight 17, which is believed to have been shot down by a surface-to-air missile.

The administration has all but blamed Russian separatists for the violence, though militia groups have denied it.

Kerry will apper on ABC's “This Week” with Rep. Mike Rogers  (R-Mich.), the chairman of the House Intelligence Committee; Maen Rashid Areikat, the Palestinian envoy in Washington; and Ron Dermer, Israel's ambassador to the U.S.

The line-up on "Face the Nation" on CBS includes Kerry, Rep. Peter King (R-N.Y.), and Martin Indyk, the former U.S. special Mideast envoy, specializing in the Israeli-Palestinian negotiations. He is now a vice president and director of the Foreign Policy Program at the Brookings Intuition.

CNN's "State of the Union" will host Kerry, Sen. Dianne FeinsteinDianne Emiel FeinsteinLawmakers feel pressure on guns Feinstein: Trump must urge GOP to pass bump stock ban Florida lawmakers reject motion to consider bill that would ban assault rifles MORE (D-Calif.), Rep. Michael McCaul (R-Texas); the U.S. commander of NATO forces in Europe, Air Force Gen. Philip Breedlove, and Robert Turner of the main U.N. aid agency in Gaza.

Meanwhile, NBC's “Meet the Press” features Kerry and Sen. Lindsey GrahamLindsey Olin GrahamCongress punts fight over Dreamers to March Pence tours Rio Grande between US and Mexico GOP looks for Plan B after failure of immigration measures MORE (R-S.C.). 

The lineup on “Fox News Sunday” includes Kerry and Sens. Ted CruzRafael (Ted) Edward CruzOvernight Health Care: Trump eases rules on insurance outside ObamaCare | HHS office on religious rights gets 300 complaints in a month | GOP chair eyes opioid bill vote by Memorial Day HHS official put on leave amid probe into social media posts Trump, Pence to address CPAC this week MORE (R-Texas), Robert MenendezRobert (Bob) MenendezJustice Dept intends to re-try Menendez in corruption case DACA is neither bipartisan nor in America's interest Senate DACA deal picks up GOP supporters MORE (D-N.J.) and Bob CorkerRobert (Bob) Phillips CorkerCongress punts fight over Dreamers to March Drama surrounding Shulkin — what is the future of VA health care? Blackburn pushes back on potential Corker bid: 'I'm going to win' MORE (R-Tenn.).

The Fox lineup suggests immigration will be a part of the discussion.

Cruz introduced a bill on Thursday that would end an “amnesty” program that allows some undocumented immigrants to remain in the country without having to worry about being deported. 

“The only way to stop the border crisis is to stop President Obama’s amnesty," Cruz said in a statement. “If we do not put an end to its expansion — to the promise of amnesty that is the reason so many are coming — then more little boys and girls will be trafficked, abused, and even killed.”