Top administration officials have denounced the group in the strongest possible terms.
Rubio says its ideology will lead it to attack U.S. allies.
Counties in Europe have long been reluctant to beef up their sanctions.
A group of 400 Russian sailors are scheduled to arrive in France later this month.
The 10-year deal will allow a larger U.S. military presence at Filipino bases.
Ben Rhodes described progress on the diplomatic deal as "discouraging."
A White House official on Monday said it is too early to say whether President Obama would veto a...
Adviser Ben Rhodes warned of "additional costs" if Russia did not act.
If ISIS forces advance toward Baghdad, the U.S. could expand its strikes in Iraq.
White House says Russia continues to send militants weapons and vehicles.
OPINION | How did Obama aide Ben Rhodes get the language for the talking points?
Sanctions expected to have significant economic ramifications on Russian companies.
Obama met with Saudi Arabia's King Abdullah to "reaffirm the importance of the relationship."