A Media Research Center study of every broadcast evening news story about the Trump administration in 2017 found the new President was by far the biggest story of the year, accounting for one out of every three minutes of evening news airtime; the tone of coverage was incessantly hostile: 90% negative, vs. just 10% positive; and more than two-fifths of evening news coverage of the President (43%) focused on controversies, not policies, with the Russia investigation alone accounting for one-fifth of all Trump coverage (1,234 minutes).
Source: 2017: The Year the News Media Went to War Against a President