President Donald Trump is proposing a change that could have a knock-on effect on your credit card rewards, making your points worth less. With bipartisan support — including from Sen. Bernie Sanders — Trump is proposing capping the interest that credit-card companies can charge at 10%. That’s more than a 50% reduction of the interest many companies currently charge (1). On the upside, as the Urban Institute notes, it could dramatically reduce borrowing costs for millions of Americans (2). But as CNBC ...