Carville is a partisan shill and known to make exagerated statements to smear political opponents.
I think in The War Room you can see him getting ready to smear Bush41 over campaign buttons that were made outside of the country. When Carville learned that they were designed and ordered by some unrelated vendor (who could have even been making buttons for several candidates, it's all money), he didn't care and wanted to see how he could spin that to still taint Bush41.
He has ZERO credibility.
I was living in Mexico in 1992 for the campaign and I didn't have full access to all the news. I seem to remember hearing that someone in the 'Toon's campaign was spreading the rumor that GHWB abandoned his crewmen on his bomber in the Pacific, parachuting to safety, while his crewmen perished. Anyone else remember that?