KABUL - Republican 2016 hopeful Senator Lindsey Graham says U.S President Barack Obama "just made up a number" on Afghan troop levels, and says more forces are needed to stabilize the country.

Graham told radio HOST John Catsimatid is on "The Cats Roundtable" airing on 970 New York on Sunday that Obama made the right move by keeping troops on the ground in Afghanistan, but caved to political pressure by agreeing to cut the force in half by 2016.

"Here's the one thing, this is typical Obama: 9,800 is what we have, and that's what we need," Graham said. "And he said, 'Well, OK, I'm gonna leave 'em there, but by the end of 2016, we're going to 5,500' - he just made up a number. He cut the base in half, so to speak."

"Typical Obama: doing the right thing, but then withdrawing at the end 'cause you're worried about politics," he added.

Graham said that the president generally has no clue what he's doing when it comes to foreign policy.

"Our foreign policy is in free fall. Barack Obama doesn't know what he's doing," Graham said adding "Radical Islam is running wild, and somebody needs to stop this."

He pointed to Iran's recent test launch of a medium-range ballistic missile capable of carrying a nuclear bomb as a sign that the Islamic Republic will not comply with the nuclear accord negotiated by the president's administration.

"Look at what's happened in the last couple of days. The Iranians are test-firing a missile that could hit Israel, in violation to UN sanctions," Graham said. "They're testing the international community; does the international community have the guts to push back against Iran?"

Graham, who has made national security a centerpiece of his campaign, has been struggling in the polls for the GOP nomination, well behind front-runner Donald Trump.

The South Carolina senator said he understands the frustration in the Republican Party that has allowed candidates with no political experience to rise to the top, but he stressed that, when it comes to foreign policy, experience is invaluable.

"Experience does matter when it comes to being commander-in-chief," he said. "I've been to Iraq and Afghanistan 35 times. I've been in the Air Force 33 years. Our foreign policy is in free fall. So the argument I would make on my behalf is that when it comes to being commander in chief, you need to know what you're doing."

Graham said he believes voters will start paying more attention to the backgrounds of each candidate on national security as international crises worsen.

Meanwhile, The U.N Secretary General Bank Ki-Moon has welcomed Obama's move and said: "In Afghanistan, President Obama has decided, as announced, to keep a certain level of soldiers there. I was informed by the U.S. government. I welcome that decision, because then maybe one of the ways at this time - a practical measure to keep political stability, to keep people from these terrorist attacks. Otherwise there will be many Afghan people who will have to flee their communities."

In addition, Russian Deputy Defence Minister Anatoly Antonov has warned that Daesh militants are planning to expand their activities into Central Asia and that they are using Afghanistan as a base for possible attacks.

Speaking at the Xiangshan Forum in Beijing, Antonov said: "The Afghan territory could be used by the Islamic State group (Daesh) to expand further towards the Central Asian republics of the Commonwealth of Independent States, and towards the Xinjiang and Uighur autonomous regions of China."

"Given that the international security forces will be withdrawn from the country, it is not clear if Kabul is able to face this threat alone," he said.

Antonov's comments come just days after Obama dropped plans for a radical reduction in U.S forces next year, which was greeted with relief by the administration in Kabul, which had feared being abandoned by its most powerful ally, reported Reuters.

Afghan forces, who took over from international troops after NATO ended most combat operations last year, have struggled to contain a spreading Taliban insurgency and remain dependent on allies for air and logistical support. (Tolonews)