1 of 12
U.S. President Barack Obama, left, and first lady Michelle Obama, right, tango with dancers during a state dinner in Buenos Aires on Wednesday, March 23. Pablo Martinez Monsivais/AP
Democratic presidential candidate Hillary Clinton shakes hands with supporters prior to delivering remarks at the American Israel Political Action Committee Policy Conference in Washington on Monday, March 21. SHAWN THEW/EPA
Demonstrators stand outside the office of U.S. Sen. Rob Portman, in Cincinnati, on Monday, March 21. A coalition of liberal groups staged rallies around the country on Monday targeting Republican senators who oppose confirmation hearings for President Barack Obama's Supreme Court nominee Merrick Garland. John Minchillo/AP
Secretary of State John Kerry participates in wreath-laying ceremony at Brussels Airport in Brussels, Belgium, on Friday, March 25. Kerry paid his respects to victims of terrorist attacks that left more than 30 dead at Brussels Airport. Andrew Harnik/AP
A bird shares the lectern with Democratic presidential candidate Bernie Sanders as he speaks on Friday, March 25, in Portland, Oregon. Sanders spoke to a crowd of more than 11,000. Natalie Behring/Getty Images
Paul Owens, left, leads a prayer over Republican presidential candidate Ted Cruz at Fresh Start Church in Peoria, Arizona on Sunday, March 20. Courtney Pedroza/The Arizona Republic/AP
Cuban President Raul Castro tries to lift up the arm of U.S. President Barack Obama at the end of a joint news conference in Havana, Cuba, on Monday, March 21. Ramon Espinosa/AP
Kshama Sawant, left, a member of the Seattle City Council, a sign opposing Democratic presidential candidate Hillary Clinton next to another protester holding up a "Black Lives Matter" sign on Tuesday, March 22, following a campaign rally at Rainier Beach High School in Seattle. Ted S. Warren/AP
U.S. Vice President Joe Biden delivers remarks at Georgetown University Law Center on March 24, in Washington, DC. Biden called on the U.S. Senate to hold confirmation hearings for Supreme Court nominee Merrick Garland during his remarks. Win McNamee/Getty Images
Roger Daltrey, lead singer of the English rock band "The Who" and co-founder of Teen Cancer America, jokingly poses with the gavel seated on the chairman's chair in a hearing room on Capitol Hill in Washington, Wednesday, March 23, at the conclusion of a "conversation on child cures" hosted by the House Energy and Commerce Committee. Manuel Balce Ceneta/AP
Republican presidential candidate Donald Trump addresses the American Israel Public Affairs Committee, one of the country's largest pro-Israel lobbying groups, during an afternoon session in Washington on Monday, March 21. In his speech, Trump proclaimed that, "the days of treating Israel like a second-class citizen will end on day one" of his presidency. Evan Vucci/AP
Catholic nuns from the Little Sisters of the Poor walk down the steps of the U.S. Supreme Court on Wednesday, March 23. The group is challenging the government's new health-care regulations. Lawyers for the nuns and other religious nonprofits told the court that the so-called contraceptive mandate forces these groups to either violate their religious beliefs or pay ruinous fines. SAUL LOEB/AFP/Getty Images
