Garry Kasparov, the former chess champion and Putin critic, says Donald Trump, the US Republican presidential nominee, is "probably"  an agent of Russia.

The Russian activist says Russian President Vladimir Putin is "definitely behind" Trump, with what he calls "an army of Russian trolls" supporting the nominee.

Kasparov who has also been a long-time critic of both Bill and Hillary Clinton, says that while he doesn't think Hillary is the best-qualified candidate for US president, "she's running against Donald Trump".

"I always say I'm not for Hillary, I'm for sanity", Kasparov adds.

Watch more from Mehdi Hasan's interview with Kasparov, in which they discuss Putin, Russia and Ukraine.

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Source: Al Jazeera