I would assume that the Democrats (as a non-American, what's up with calling them 'liberals'?) being out of power for four years will make them literally incapable of being why Trump fails to solve these problems.
Meh. The Democratic party coopted the term liberal and use it in all of their marketing. So much so that their opponents now use the term as a naked slur. shrug Politics in the US is stupid and getting dumber and scarier by the day.
The Democrats are absolutely liberals in the European sense of the word. They are pro-capitalism and have abandoned any pretense of pro-worker or leftist thought. HRC was George W. Bush reincarnate, Bill Clinton was as far right as any pre-Reagan Republican. Obama is a bit to the left of the Clintons, but he's still staunchly center-right and you'll notice that Obamacare is not single-payer nor does it allow for the government to compete in the marketplace.