Marco Rubio in Fox News GOP debate in Detroit MI

On War & Peace: I've warned about ISIS in Libya for 2 years; US troops there

RUBIO: That's correct, and Libya.

Q: Because military commanders say the biggest ISIS threat to Europe now is coming from Libya, not Syria?

RUBIO: Correct.

Q: So if you're for putting more U.S. ground troops in Iraq and Syria, are you also ready to send U.S. ground troops on the ground in Libya?

RUBIO: Well, what I've argued from the very beginning is that in order to defeat ISIS, you must deny them operating spaces. Today that operating space has largely been based in Iraq and Syria, but I've been warning about the Libyan presence for the better part of two years. So they need to be targeted wherever they have an operating space. They can only be defeated if they are driven out and the territory is held by Sunni Arabs. But it will require a specific number of American special operators, in combination with an increase in air strikes.