The chairman of the U.S. Senate Armed Services Committee, John McCain, has said that U.S President Donald Trump's national security team is developing a strategy that will lead to victory in Afghanistan, Reuters reported.

He said Trump has great confidence in that team.

"I do believe that most of the time he accepts their advice and counsel. Can I tell you that he does all the time? No. And yes, does it bothers me? Yes, it bothers me," he said.

Meanwhile, he said that Russian President Vladimir Putin is a bigger threat to global security than Daesh, and warned that the U.S Senate would push for sanctions against Moscow for its alleged interference in the Unites States election, he said in a debate in Australia.

"I think he (Putin) is the premier and most important threat, more so than ISIS (Daesh)," McCain said.

He said while there was no evidence the Russians succeeded in changing the U.S election outcome, they were still trying to change elections, including the recent French vote.

"I view the Russians as the far greatest challenge that we have," he added.