ACTBLUE is an online system that aggregates the online functionality for collecting donations to Democratic candidates. It has been around for about 20 years. In the Federal Election Commission database of all political contributions made to federal campaign vehicles (individual candidates and committees), ACTBLUE can end up appearing on both sides going through donor and recipient lists.
Looks like this is all stories told by the professional storytellers. Manchin seems to be collecting more campaign money in Tuscaloosa, Alabama via college football than he does in Houston, Texas via oil industry types. Given social connections to West Virginia football, I am kind of surprised to not see Tilman Fertitta (owner of the Houston Rockets and supposedly Mark Kelly's best friend) high on Manchin's donor list. I guess the Rice brothers' dad lives in Boston, so perhaps he is doing yeoman's work bundling for Manchin in Massachusetts, but I do not see big donations flowing in from Pittsburgh where EQT actually is. My guess is that Ken Griffin, Peter Singer and Ken Langone are funneling more money to Manchin than Exxon employees are.
A West Virginia Senator should represent the interests of the coal industry (and its employees).
Look up the Inch Pipelines and the eventual birth of Texas Eastern; it is an interesting story. Pennsylvania, West Virginia and Virginia conspired to block the construction of natural gas pipelines into the Northeast for decades to maintain the urban markets for "coal gas" which was processed from coal within cities to be piped into homes. This is, for example, how Faraday isolated benzene as it condensed on municipal gas mains in London (frightening!), which does not happen with natural gas today. But the cities on the Acela Corridor did not gain access to natural gas until several years after the war, when the broader US started converting over from coal gas to natural gas in the 1920s. Natural gas had significantly higher energy density than coal gas and was quite a bit cheaper. This is almost certainly why natural gas pipelines are now federally regulated in the US while oil pipelines are still state regulated.
For a more modern version of this dynamic, scratch the surface on any lobby or activist group promoting wind energy, and you will find natural gas money. The entire subsidy framework in the US was designed by lawyers at Enron back in the 1990s. In Europe, Russian fingerprints are everywhere. The same is generally true for anti-nuclear activism. One of my favorites is the fact that Harold Hamm (America's richest oil man) was the main bankroller of activists blocking the Keystone XL Pipeline.
If you want to get into three dimensional chess (or tin foil hat) stuff, the main financial backers of the California Proposition 47 that made petty crime virtually un-prosecutable, thus turning the public spaces in LA and San Francisco into ungovernable, open air drug markets and homeless encampments was largely funded by John Arnold (a Houston natural gas billionaire) and the Schusterman Family (Tulsa oil billionaires with huge real estate interests in Texas).