Sen. Menendez said Iran is "drawing a line in the sand."
The deal took effect this weekend over the objections of many Republicans.
“The reality is we live in an incredibly dangerous world," he said.
It is unclear if he was killed by Russia or the U.S.-led coalition.
Iran also tested a missile a day after the USS Roosevelt left the region.
The meeting comes after criticism about the administration's response.
State has suggested that Israelis might bear some blame for the escalating violence.
UPDATED | Almost 10,000 U.S. troops will remain there for most of 2016.
The annual U.S. report also lists Boko Haram and al Shabaab.
The president will send up to 300 troops to Cameroon to take on the extremist group.
Tuesday was the bloodiest day in a recent string of violence.
The launch would not violate the nuclear deal with Iran, officials insist.
Kerry and top diplomats are setting high expectations ahead of the U.N. conference.
Rep. Adam Kinzinger said U.S. troops will probably be in Afghanistan "for a while."
Graham said Obama made the right move keeping troops, but more were needed.
North Korea’s shadowy hacking army is back in the spotlight.
The breach is reportedly far more serious than the smaller intrusion revealed last week.
A decade of fighting the war on terror only militarily has not worked.
“It made me feel so sad that the Democratic Party has dropped so far," he said.
The GOP front-runner called incident "horrible," but said there was little U.S. could do.
The incident happened on Saturday over Aleppo.
President Alexander Lukashenko's latest victory will bring more of the same.
The deal is set to be adopted this weekend.
The Obama administration wasted its "leverage" to free Jason Rezaian, GOP lawmakers say.