If the America tax reform bill pass, then the price of USD will rise, could it affect the price of bitcoin?
I don't think so. One of the great things about bitcoin is that it is decentralized so it's not really tied to political decisions that don't affect it directly. If we talk about bitcoin regulation, then of course it affect bitcoin price, but if it's just internal politics, then I doubt it will have any effect at all. If the dollar rises, there could be a slight adjustment in the exchange rate of the pair Dollar/BTC, but since they will probably just buy more, I think these effects will disappear without we even noticing them.