President Obama's decision to issue an executive order without the approval of Congress is causing a firestorm across the country.
Republicans say the move is illegal. Four governors are threatening to sue the President over his plan to shield million of undocumented immigrants from deportation
But Barack Obama is not the first President to go at it alone.
CNN's Tom Foreman has the report.
Israel has ramped up security after two Palestinians wielding a gun and butcher knives killed five people, three of them Americans, at a synagogue.
Officials have vowed to demolish the homes of the two attackers. Officials did demolish the home of another Palestinian who killed two people last month when he drove his car into a crowd of people standing at Jerusalem train station.
The Associated Press found the attacker's grandmother sitting in the rubble today. She told them she was proud of her grandson's actions, saying "no one should feel sorry for us, for our demolished home."
OutFront, Israel's Ambassador to the United States Ron Dermer.
President Obama is ordering a review of how the U.S. handles terrorist-related hostage cases.
The big development comes as ISIS released video of its murder of American aid worker Peter Kassig, the fifth western hostage killed by ISIS since August.
The White House was quick to point out that paying ransoms is not on the table.
OutFront: Retired Air Force General Michael Hayden, who served as both director of the CIA and the National Security Agency.
It was one of the worst terror attacks in Israel in recent years.
Two Palestinian men, wielding butcher knives and a gun, attacked and killed four men as they prayed at morning services in a Jerusalem synagogue. Several others were wounded.
Three American rabbis with dual citizenship are among the dead. A fourth rabbi, a British-Israeli man, was also killed, along with a policeman who responded to the attack.
Police killed the attackers.
Dore Gold is a Senior Foreign Policy Adviser to Israeli Prime Minister Benjamin Netanyahu. He is also a Former Israeli Ambassador to the U.N.
American aid worker and former U.S. soldier Peter Kassig has been beheaded by ISIS terrorists. Kassig first went to the Middle East after he joined the U.S. Army in 2006.
He was briefly deployed to Iraq a year later.
But he returned in 2012 on his own, to deliver humanitarian aid to Syrians affected by the fighting there.
In an interview with CNN's Erin Burnett, Sarah Pollom, a friend of Kassig's, says his mission in life was to make a difference.