Rubio, appearing on ABC's This Week, lashed out at Paul, who has expressed support for opening trade with the island nation after a decades-long embargo.
On CNN's State of the Union, the president expanded on earlier remarks he made criticizing a decision by Sony Pictures to pull distribution of The Interview.
The assailant, identified as 28-year-old Ismaaiyl Brinsley, is thought to have shot his ex-girlfriend and then used her Instagram account to post threatening messages.
Two police officers have been killed in their patrol car in Brooklyn. The suspect fled and killed himself on a subway platform. NPR's Rachel Martin talks to WNYC reporter Robert Lewis for the latest.
The FBI says North Korea was responsible for the Sony cyber hack. North Korea denies involvement. NPR's Rachel Martin talks about possible next steps with Georgetown University professor Victor Cha.
Brad Woodhouse is a Democrat. His brother, Dallas Woodhouse, is a Republican. They were arguing on C-SPAN when their mother called in. Watch their exchange.
The controversy around The Interview is a top story in the U.S., but those in North Korea have no knowledge of the film. NPR's Arun Rath talks with Washington Post Tokyo bureau chief Anna Fifield.
A Montana man says he was justified in shooting a prowler, a German exchange student, in his garage. The case has revived the debate over how far Americans should be able to go to defend their homes.