Russian expert James Nixey told ITV News that he does not think the meeting between Russian President Putin and Prime Minister Cameron will "result in a substantial change in position."
He says there is still a "fundamental divergence of values" on the issue, and he does not think "one pre-judo meeting" will accomplish.
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Rain will affect most of the UK today, with Scotland remaining largely fine and brighter spells appearing in the east and south.
In a searingly emotive address, the president cast Hillary Clinton as the most qualified candidate to unify America as next US president.
The release is the second batch in a series of leaks that have rattled the Democratic Party.