Two Things:
1. Nothing will change unless the media becomes honest again and there is no chance of that.
2. The margin is razor thin at best, there is no conservative on the horizon that can properly articulate what they need to and, there are still a million illegals coming in every year. Not to mention there are a million LEGALS immigrating here every year too. They are probably registered as Dimocrats upon receiving their citizenship (700,000 per year).
Yes Hispanics (legal and illegal) have changed the landscape.
(bad pun)
They are now larger than blacks as a bloc, and 70% plus Dem voters, and growing fast.
Please point me to this magical time when the media was ever honest?
They were fairly pro-American during WW2, but I'd argue that is because of Hollywood's sympathy with the Soviet Union and it means they and our government had a common enemy in the Axis powers.
There is probably more conservative media right now than there has ever been. Is the mainstream media and entertainment establishment biased? Yes indeed. Is it a huge assist to the left? Absolutely. Is it ever going to change? Nope. The problem is the people who are attracted to fields like journalism, education, and arts are by and large folks that spend time trying to "empathize with the human condition" and those people will almost always be liberal.
It more basic then that. 49% of the populace wants a free ride. They will vote so as to continue that free ride.