I should just ignore you because for some reason you have chosen not to disclose your nationality.
I will go on the assumption that you are not an American. But I am not going to bother sourcing anything for you, if you don't believe what I am saying, oh well. Most of what I have to say is anecdotal anyway.
The people in this country were sick of businesses as usual in Washington.
The Democrats, "champions of the little guy", cost this country millions of good paying jobs with trade deals. I remember when NAFTA passed, I remember thinking to myself that it was kind of like welfare for Mexico. I supported Clinton, by the way. I knew that Mexicans would work for much less than Americans, and a lot of jobs would be lost, but I didn't think it would end up being as bad as it is.
I personally abandoned the Democrat party during Bill Clinton's impeachment. I delivered pizzas at the time and I got my news from NPR on my car radio. It was obvious that Bill Clinton had committed perjury, but the spin that it was just about sex, was more than I could stomach. The Republicans were labeled as prudes and Ken Starr was called a pervert.
When President Obama was elected, I did not support him, but at least, I thought, it would put an end to notion that this was a racist country. Obama did nothing but add fuel to the fire from the beginning. From the Cambridge police acting "stupidly" for arresting a college professor, to Trayvon Martin looking like his nonexistent son, the President only fanned the flames. Add to that the media doctoring the 911 call made by Zimmerman (the white hispanic) and for months trying to convince us that Martin was killed by some kind of cop wannabe in an act of vigilante justice, people got sick of it.
Then the media pushed the story of the the strong arm robbery suspect, the gentle giant, and his plea "hands up, don't shoot", which everyone with half a brain knows is just a lie. That spawned the BLM, and emboldened a bunch of nutjobs to start killing cops.
But I am getting way off the topic of your question.
I think Trump was elected because there was this growing movement. It started before the 2008 election. There was this huge financial crises, McCain even suspended his presidential campaign to get back to Washington. Many Americans were already concerned about the growing national debt. Then George W. Bush, added 700 billion more by bailing out financial institutions in the US. I remember seeing normal people protesting this on the street on my way to work one day. My boss and I were tempted to go and join them, but eh. This grew into what was later called the Tea Party (I have alway hated that it had a label at all).
The media tried to tell us that the Tea Party was nothing more than Astroturf, an organized and often paid for by right wing groups, or people like the Koch brothers. But no one believed that. It was a truly organic grass roots, rising up of ordinary Americans.
These people (and I'm included in this) wanted to send a bomb to Washington to blow up the establishment. You have congressman and senators that have been there for decades getting rich, far beyond what the government pays them. They are even allowed to engage in insider trading, knowing they have the power to manipulate stock prices with the laws that they pass.
To be quite honest, I rarely watch Fox News, and most of my friends don't watch it at all. This has been more of a word of mouth thing among every day Americans.
@Sanji Himura is right, this is very similar to the Reagan revolution.