Today on The Gist, Slate's Dahlia Lithwick explains the vulnerability of Friday's SCOTUS ruling on gay marriage, and a favorite Scalia moment from the arguments. She's the host of the Slate podcast Amicus. Plus, our regular guest Chris Molanphy suffers recalling the wide range of hits from 1990. For The Spiel, the tragedy of Bristol Palin, who recently announced that she's expecting. Read more of Slate's coverage of same-sex marriage at the Supreme Court. Today's sponsor: Vegas.com. With Vegas.com, your summer vacation is just a click away. Find great deals on hotels, shows, tours, and VIP treatment at top clubs. Go to Vegas.com, and enter the promo code GIST for 10 percent off everything but air-hotel packages. Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at slate.com/gistplus.

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