My god, this will be one hell of a topic next week on the podcast...
As WPM already explained, he has been reporting anything Pokemon related for the last 21 years. He has written about political figures that reference the Pokemon franchise in any way before and I don't see a reason why he should stop in the future, as all his articles are always as neutral and informative as possible.
That's why I don't get why certain people take this report about Vance so seriously, as it's something that he himself told publicly on a podcast. WPM is therefore not "uncovering" something "secret" or spreading misinformation about a political figure.
This whole election campaign has been blown totally out of proportion, resulting in two parties that will feel offended by the slightest mention of their politicians that isn't all sunshine and rainbows.
I personally believe that WPM had no intention of making this about a certain political party, but instead simply wanted to report about this, as he usually does when something Pokemon happens.
So please remember this is fact, not fiction, and don't go insult people for their work that you can enjoy for free.