Republican presidential nominee Donald Trump speaks during a campaign event at Briar Woods High School August 2, 2016, in Ashburn, Virginia.

Despite a last-minute re-shuffle of his campaign, an academic at the London School of Economics believes the race is almost run for Republican nominee Donald Trump.



In an attempt to arrest sliding support, Trump this week named Steve Bannon, a former investment banker, to the post of chief executive and promoted pollster Kellyanne Conway to campaign manager

But Brian Klaas, a Fellow in Comparative Politics at the London School of Economics, told CNBC Friday that Trump may not have enough time to sway voters.

"Early voting starts in the United States in a couple of weeks. So, about a third of all voters will cast their ballots before the day of the election.

"And with race crystallizing at it is now, I think Trump's running out of time to fix a sinking ship," he told CNBC .

He said that Trump is losing his core white male support, crucial to his success.

"That is where Mitt Romney absolutely trounced Obama in 2012 and the gap is closing. He is winning fewer of those voters than Romney won. And that's a huge problem for Trump," he said.