David Plotz, John Dickerson and Emily Bazelon discuss the terror attacks in Brussels, the national political races and the push for Obamacare exemptions under consideration by the Supreme Court. The Slate Political Gabfest is brought to you by Stamps.com. Buy and print official U.S. postage using your own computer and printer, and save up to 50% compared to a postage meter. Sign up for Stamps.com and get a 4-week trial and a $110 bonus offer when you use the promo code GABFEST. And by Texture, the mobile app that gives you full access to more than 150 of the world's most popular magazines, anytime, using your phone or tablet. Read Vogue, People, Esquire, Time—and hundreds more—from back issues to the one currently on the newsstand. Right now, try Texture for free at Texture.com/political. And by Amazon. Detective Harry Bosch is back on the new season of Amazon’s Original Series Bosch, based on the best selling novels by Michael Connelly. Stream the new season now on Amazon Prime Video.  Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at www.slate.com/gabfestplus. Twitter: @SlateGabfestFacebook: facebook.com/GabfestEmail: gabfest@slate.comShow notes at slate.com/gabfest Learn more about your ad choices. Visit megaphone.fm/adchoices