From Slate:
In its last term, the U.S. Supreme Court heard fewer cases than it has in any single term in more than 50 years. This means that getting your case heard at the high court is about 10 times harder than getting into Harvard. How do you up your odds? Just as a recommendation letter from a well-placed alum gets attention from an admissions office, a supportive brief from an advocacy group, sent to the court at the stage when it’s deciding whether to take a case, flags a case for the justices.
Each year, parties that have lost in the lower courts file about 9,000 petitions for a writ of certiorari (cert for short) in which they beg the court to hear them. The Supreme Court has nearly complete discretion over which cases it will take. Last term, only 69 cert petitions resulted in arguments before the justices. The lucky few were more likely to have gotten a helping hand from a friend-of-the-court brief, filed by an outside group with an interest in the case’s outcome. Influence, in this sense, is all about timing. Amicus briefs, as they’re known, tend to pile up on both sides of a case once the court takes it, all competing for the justices’ attention. But the amicus briefs filed before the court grants cert are much rarer, and, accordingly, more influential. Yet this is a tool that liberal groups often fail to use.