Should voting be mandatory in the United States?

Here's the version nobody on the pro side wants to talk about: mandatory voting plus strict voter ID laws equals a poll tax with extra steps. Half the states pushing ID requirements would love a federal mandate, because now the fine falls on exactly the people who lack IDs: the poor, the elderly, students, minorities. You would be legally required to do the thing the state made hardest for you to do. ACLU litigation has shown over and over who ID laws actually block. Unless the mandate comes bundled with automatic registration and free IDs, it's a trap, and we all know Congress would pass the mandate and skip the rest.