All these comparisons of Trump = Nixon makes me wonder if Nixon-era media was anything like it is today.
I understand there weren't any 24 hour news networks back then so of course it'd be different that way. Also, did Nixon have House/Senate majority as Trump does today, and what ultimately led to the public outcry for Nixon's impeachment?
As for your first question, there wasn't a 24 hour news cycle, but print news was still really popular. The New York Times was the "liberal" newspaper, and The Wall Street Journal was considered the "conservative" newspaper and this is still applicable today even though newspapers have fallen out of favor. However, even there, most people only read their local newspaper during the days newspapers were relevant, and most local papers would be considered liberal. Magazines like Time, Saturday Evening Pose, and National Review were also considered conservative. I'm not sure about the reaction to Watergate though. I assume some supported him.
As for your second question, at the time of Watergate, Democrats had a 56-42 lead in the Senate (with one Senator James Buckley from the Conservative Party of New York and one independent Senator Harry Byrd who was a former Democrat) and a 255-180 lead in the House of Representatives.