Republican presidential candidates accused President Barack Obama on Sunday of showing weakness in U.S. policy in Syria, doubting that his small deployment of special operations troops will make much difference without a coherent broader strategy.

"I don't have a problem with the tactics of it. And the numbers might even have to be larger at some point," Florida Sen. Marco Rubio said of the Obama administration's disclosure on Friday of the deployment of fewer than 50 special operations troops on the ground in northern Syria in the coming weeks.

"I think the broader issue is: what is the strategy?" Rubio said on the CBS program "Face the Nation."