I don't believe Democrats are rigging elections (well, not anymore -- they definitely did in 1960 for Kennedy), and I don't think any sensible Republicans believe that, either.
What I do believe is that Republicans are dealt a very tough hand by both the mainstream media and entertainment industry, both of whom bash Republicans so often that it equates to a staggering amount of free negative political ads on behalf of the Democrats.
Like it or not, we are a media driven country. We have certain stubborn voters on both the left and right who will never be swayed by propaganda, but the centrists can be swayed by the slightest thing which pisses them off about one side or the other.
The Dems have long had the media and entertainment industry on their side (especially the latter), to where a large number of moderate voters are swayed against the Republican candidate due to this media/entertainment propaganda.
This is why I complain about videos such as the SNL debate parody. It's not that SNL has any requirement to act fair and balanced, but it's that the average middle-of-the-road voter watches it and takes in the sharp criticisms about Trump, but virtually none about Hillary.
Even known liberal Dean Obeidallah
wrote that the SNL parodies are likely to really hurt (or perhaps destroy) Trump's chances, though Obeidallah claims it's a good thing because he feels the parodies expose Trump for what he is.
But that's the whole problem. The entertainment media should not be inserting itself into politics, at least not to the point where they take sides. They're essentially signing on to be a free propaganda machine for Hillary, which is very tough to overcome, and thus removes fairness from the election. The entertainment media should give it equally to both sides, thus preserving neutrality while still being (even more) entertaining.
Sadly, the entertainment industry and the mainstream media have decided it's their moral duty to take sides in elections and influence who gets elected, which is very dangerous, as that gives an immense amount of power to a very tiny group of elitists.
It reminds me all too much of the state-sponsored propaganda machines in communist governments.
I am no Trump defender, and I won't be voting for him.
But has he been given a fair shake in the media or entertainment products since the general election began? Fuck no. That's a lot of what Trump has been trying to say, but in usual Trump fashion, he bungled the message.