Sunday shows preview: Campaigns get personal
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After a week-long feud between GOP front-runners Donald TrumpDonald John TrumpHouse Democrat slams Donald Trump Jr. for ‘serious case of amnesia’ after testimony Skier Lindsey Vonn: I don’t want to represent Trump at Olympics Poll: 4 in 10 Republicans think senior Trump advisers had improper dealings with Russia MORE and Ted CruzRafael (Ted) Edward CruzDebbie Wasserman Schultz marks 10 years as breast cancer survivor Foreign agent registration is no magical shield against Russian propaganda Let Trump be Trump and he'll sail through 2020 MORE in which their wives were dragged into political attacks, both candidates will tell their sides of the story on Sunday’s political shows.

The latest spat began earlier this week when an anti-Trump super-PAC released an ad featuring a nude Melania Trump, prompting almost daily barrages from the Trump campaign on Cruz and his wife, Heidi.

Though Cruz has repeatedly denied any connection to the super-PAC or its ad, Trump has compared the appearances of his wife and Heidi and threatened to “spill the beans” on her.

Tensions seemed to erupt Friday when Cruz blamed Trump and his “henchmen” for a National Enquirer story that alleges he’s had extramarital affairs.

Secretary of State John KerryJohn Forbes KerryLobbying world Kerry: Trump not pursuing 'smart' or 'clever' plan on North Korea Tillerson will not send high-ranking delegation to India with Ivanka Trump: report MORE will also appear on Sunday’s shows to discuss the U.S.’s response to this week’s terror attacks in Brussels.

Sen. Bernie SandersBernard (Bernie) SandersSchumer: Franken should resign Franken resignation could upend Minnesota races Avalanche of Democratic senators say Franken should resign MORE will also make the rounds to discuss the results of Saturday’s three Democratic contests in Alaska, Hawaii and Washington state.

ABC’s “This Week:” Donald Trump and Sen. Bernie Sanders

CBS’ “Face the Nation:” Secretary of State John Kerry; Texas Rep. Michael McCaul (R-Texas); John Miller, deputy commissioner, New York Police Department; Michael Morell, former deputy CIA director.

CNN’s “State of the Union:” Sanders; Rep. Mia Love (R-Utah); Sen. Ron JohnsonRonald (Ron) Harold JohnsonOvernight Cybersecurity: Panel pushes agencies on dropping Kaspersky software | NC county won't pay ransom to hackers | Lawmakers sound alarm over ISIS 'cyber caliphate' GOP chairman warns of ISIS's ‘cyber caliphate’ Overnight Finance: House approves motion to go to tax conference — with drama | GOP leaders to consider Dec. 30 spending bill | Justices skeptical of ban on sports betting | Mulvaney won't fire official who sued him MORE (R-Wis.)

“Fox News Sunday:” Sen. Ted Cruz; Rep. Devin Nunes (R-Calif.)

NBC’s “Meet the Press:” Michael Leiter, former director, U.S. National Counterterrorism Center