You should offer me the opportunity to persuade you otherwise.
Polling data says you should accept the media being left of mainstream America. That's based on a survey sample of the media and going by journalists' self-perception.
The American Journalist | Pew Research Center's Journalism Project
That's from 2006, of course. Lately the trend is for more journalists to identify as "Independent." But it's still markedly to the left of the American mainstream.
If it bleeds it leads, right. But that's tangential to the ideology of journalists.
No, that doesn't follow, and it isn't even the right way to think about it. In terms of American ideology, the average American is exactly in the center. Journalists are left of the average American. But Americans are more likely to identify as conservative than liberal (by quite a bit), and are all over the map on various issues. So a canny campaign manager can swing the vote depending on how the campaign plays to the special interests (using the term in its hopefully value-neutral sense) of the electorate. And that's where the media can help. Or hurt.
It's worse than you think. People tend to vote for the candidate they like. Informed voters are the minority. Voters with the highest education tend to vote Democrat, but as the cross-section drops in terms of education Republicans quickly take the lead. Uneducated people tend to vote Democrat. So the Democratic base is a minority of very educated people and a majority of the least-educated voters. The bulk of the GOP base is between those extremes. The political game, then, is to make your candidate more likeable than the other choice. The least-educated and the swing voters together make the difference between winning and losing in most elections. And the media play a part in that.
The key for Democratic electoral success right now is probably based on distrust of religion. But that's a subject for a different thread.