The laws are pretty clear regarding this. The only acts along those lines that are automatically expatriating are enlisting in a foreign military *engaged in active hostilities against the USA*, and accepting a policy-level office under another nations government (e.g. president, a cabinet minister, etc.). There are other “potentially expatriating acts” but these must be done *with the intention of losing US citizenship*. If the individuals intention is to remain a US citizen, the law is very clear. There is no loss of citizenship. It is not a question of enforcement or discretion. It is the US code.
You are talking about people who were born American losing citizenship. There are people who came to this country and applied for citizenship and it can be revoked and the government used to actively knock them out for double voting