Bigger than Watergate? Or a transparent sham? Whatever else it may be, the story of Donald Trump and Russia comes down to this: a sitting president or his campaign is suspected of having coordinated with a foreign country behind the scenes of the election that put him in office.

Trump strongly denies all wrongdoing and calls the inquiry a “witch-hunt”. But prosecutors see red flags everywhere.

The affair has the potential to eject Trump from the White House. But with the president protected by Republicans in Congress and impeachment a longshot historically, Trump’s fate probably lies in the ballot box.

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