Secretary of State John KerryJohn KerryJohn Kerry channels Yoda in tweetstorm John Kerry goes on tweetstorm as Senate eyes Iran legislation John Kerry's advice to Harvard grads: Learn Russian 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.

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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 FeinsteinFeinstein: Comey memos 'going to be turned over' Judiciary chair may call for meeting with Mueller Dem senators accuse Trump of purposefully holding back information 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 GrahamOvernight Cybersecurity: Bad Russian intel may have swayed Comey's handling of Clinton probe | Apple sees spike in data requests | More subpoenas for Flynn | DOJ's plan for data warrants Overnight Finance: GOP bill would leave 23M more uninsured, says CBO | Trump aides defend budget | Mnuchin asks for clean debt hike before August | Ryan says House could pass bill without border tax GOP senators distance themselves from House ObamaCare repeal bill MORE (R-S.C.). 

The lineup on “Fox News Sunday” includes Kerry and Sens. Ted CruzTed CruzGOP senators distance themselves from House ObamaCare repeal bill Cruz: Jokes about me in Franken's book 'obnoxious' The Hill's 12:30 Report MORE (R-Texas), Robert MenendezRobert MenendezThe Mideast-focused Senate letter we need to see Taiwan deserves to participate in United Nations The way forward on the Iran nuclear deal under President Trump MORE (D-N.J.) and Bob CorkerBob CorkerIs Trump's White House headed into troubled waters? Overnight Tech: FCC won't fine Colbert over Trump joke | Trump budget slashes science funding | Net neutrality comment period opens Clinton administration official knocks 'soap opera' of Trump White House 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.”