Ordered my 2016 Silver and Copper ones a couple weeks back, I'm hoping they gain as much value as the 2008 Ron Paul ones did. No mintage info available though. Wish I would've held out and bought the 2017s at the same time as the 2016, I figured they would revert back to the liberty design after the election year was over.
It would have to go through congress. The mint makes a profit on the halves and quarters anyway (IIRC it costs $0.13 to produce a half and $0.07 to produce a quarter) so I don't think they'd suspend those, but I could definitely see them making the cent and nickel NIFC or suspending them.
Why is it that African countries like to put US Presidents on their coins? Like Liberia with the George W. Bush coins a while back and now this.