Hillary Clinton and Donald Trump solidified their status as their respective party front-runners after convincing wins in the New York primary this week, but both continue to face challenges from inside their parties. Clinton continues to weather criticism from rival Bernie Sanders while Trump has continued to lash out at the Republican Party's "rigged system" for delegate selection. Dan Balz of The Washington Post & Doyle McManus of the Los Angeles Times will report on the presidential race as it shifts to Northeast/Mid-Atlantic primaries next week.
President Barack Obama arrives in Saudi Arabia this week at a low point in relations between Washington and Riyadh that are likely only to be set on a different course by whoever is elected to the White House in November.
Gwen Ifill is moderator and managing editor of "Washington Week" and co-anchor and managing editor of the "PBS NewsHour." The best-selling author of "The Breakthrough: Politics and Race in the Age of Obama," Gwen has covered seven presidential campaigns and moderated two vice presidential debates.