Without a federal law, LGBT rights will be chipped away like Roe v. Wade.

We absolutely need a nationwide solution to LGBT discrimination, writes Matt Foreman. (Shutterstock)

In the wake of this month’s inconclusive Supreme Court decision in Masterpiece Cakeshop v. Colorado Civil Rights Commission, here’s a prediction of what happens next: another wave of lawsuits and state bills aimed at sanctioning discrimination against LGBT people.

This is exactly what opponents of LGBT equality have been doing since the Supreme Court’s…