Int. With John Kasich, Clinton-Sanders Sharpen Attacks, Trump Predicts Recession

The Panama Papers: 7 things to know. What are the Panama Papers? ICIJ and an international coalition of media outlets investigated the trove of papers which allegedly reveal a clandestine network involving associates of Russian President Vladimir Putin, and business ties between a member of FIFA's ethics committee and men whom the United States has indicted for corruption. Why are they called the Panama Papers? The more than 11 million documents, which date back four decades, are allegedly connected to Panama law firm Mossack Fonseca. ICIJ reports that the firm helped establish secret shell companies and offshore accounts for global power players. ICIJ reports that a 2015 audit found that Mossack Fonseca knew the identities of the real owners of just 204 of 14,086 companies it had incorporated in Seychelles, an Indian Ocean archipelago often described as a tax haven. Trump's trouble in Wisconsin. Tuesday's Wisconsin primary is the best chance for Republicans to deal Donald Trump a major loss just before the race shifts to East Coast states where he's expected to dominate. But it comes after his rockiest week yet on the campaign trail, with Trump -- so far made of Teflon, seemingly immune from the ill effects of the controversies he's triggered -- at risk of suddenly looking vulnerable, particularly after reversing himself several times within 72 hours on issues related to abortion. Mathematically, Wisconsin won't make or break Trump's path to the Republican nomination, but a loss here could make it much harder for the Republican front-runner to clinch the party's nomination. Wisconsin on tap: Clinton and Sanders brawl. Hillary Clinton campaign strategist Joel Benenson's call a week ago for Sanders to improve his "tone" and focus his criticism on Republicans has backfired. The front-runner and delegate leader would like to shift her focus to taking on Republicans in the general election. But Sanders isn't going away. He could win Tuesday in Wisconsin and he's competing hard in New York, which votes on April 19. The two have also traded sharper exchanges in recent days, starting Thursday when Clinton told Greenpeace activists that she was "so sick of the Sanders campaign lying about me" taking fossil fuel industry donations. Then, Sanders demanded an apology, saying his critique of Clinton is true.