Visualization from hoaxy.com of network diffusion of claims about a Trump rally held in Nashville in March 2017.
There are any number of fact-checking websites that claim to view the act-checking sites above as biased toward a liberal slant. There are also a number of fact-checking websites that fall on the left side of the spectrum. You will have to do your own investigation to find a site that you think best represents a fact-based approach.
Ultimately, it's best to use fact-checking websites as a jumping-off point to doing your own original research.