Did Russia Influence the US Election?

Donald Trump calls allegations that Russia tried to influence the US elections, "ridiculous, just an excuse."

That puts the President-elect at odds with the CIA, the Democrats — and leading Republicans — on whether Vladimir Putin helped put Trump in the White House. President Obama's accused of failing to take any action long before the November voting — but Trump is isolating himself even before he takes office. He says the intelligence community is being used for politics, while members of both parties in Congress say the stakes are too high for partisanship.