If there is cause to suspect that high-ranking officials, if not the C-in-C himself, may have committed a serious crime, it makes sense to keep that as a large criticism. For a frivilous Distraction that Nothing Will Come Of, it hasn't helped his popularity, nor allowed him to pass anything requiring negotiation or compromise. And aren't most of the town hall interactions focused on healthcare?
A lot of searching for reasons why people shouldn't care. It really feels like some don't want Republicans to be held accountable for their obstruction of justice, more important for Democrats to be held accountable for inadequate messaging, I suppose.