The cryptocurrency industry has been clamoring for issue-specific legislation in the U.S. for years, hoping that such legislation could create clear permissions for companies to develop and issue tokens, manage blockchain networks, or otherwise operate without the worry that regulators might come knocking. The closest Congress has come so far is the Financial Innovation and Technology for the 21st Century Act, a House bill backed by Financial Services Committee Chairman Patrick McHenry (R-N.C.). With a limited number of business days remaining in the year, the chances of cryptocurrency legislation passing the Senate are slim. So here’s what could happen and the potential obstacles.