the irs already knows that line is violated constantly. unfortunately, they don't have the resources or the kahunas to go after the churches that do this. there's way too many (like most of them, probably), and "going after churches" would be a political shitstorm regardless of the constitutional validity of such "persecution"
Churches should be tax liable anyway, regardless of whether they tell you how to vote. Why are they exempt, but other businesses aren't? Or rather, why are other business tax liable when churches aren't?
In my youth I went to your standard Roman Catholic schools and church and such, and they would never ever try to influence your decisions in this way. That's wild.
Now, I dislike organised religion as much as the next person, absolutely. But if there's a religious group that are trying to take away people's agency on who to vote for, they need to be shut down immediately.
I am Catholic and it annoys me to no end when priests do this as if a politician is even honest about what they claim to support half the time in the first place. I didn't know I could report them! Where's the form?!
If a church is taking advantage of the US 501(c)(3) tax-exempt status, this is an issue.
Some churches are aware of restrictions on political speech on their tax-exempt status and follow the rules. As reported in other comments here… others do not.