Manchin is terrible but he's the best we can expect from West Virginia. New York, New Jersey, and Maryland can do better though.
I reject this. Sure, the current Democratic Party is not a good fit for West Virginia, but the state is not inherently conservative by any means. The right left-wing arguments could sway it.
The problem is when West Virginians realize that what you're telling the other states (for example the states that like environmentalism more), isn't the same as what you're telling their state.