“Obama struck back at Moscow”

No. he simply used these empty allegations as an excuse for further expanding the US-led effort to undermine Russia (and China) as US/EU power wanes as a result of decades of unchecked corruption, unprecedented corporate power and inequality, and of course, the strain of the incessant criminal US-led wars of the past 15 years, most of which were part of this campaign.

“by tweeting, without evidence”

That’s an interesting statement from the media that has ignored those within the intelligence community saying there is no evidence to support these hysterical accusations …

“Emails stolen during the campaign were released in the final weeks by WikiLeaks”

And proved the Democrats, Clinton’s campaign, and the mass media worked together to undermine Sanders in the primaries, in order to protect the status quo, and to manipulate the California vote days in advance. They also provided evidence of US crimes in Libya, Ukraine, Syria, etc.