Landmark bipartisan housing legislation has stalled in the House of Representatives after passing by a wide margin in the Senate. Here is a look at some of the holdups.

The Senate voted 89-10 last month to pass the 21st Century ROAD to Housing Act, which would lessen some government regulations on housing and incentivize state and local governments to ease land-use regulations. The vote was on a bill that combined House and Senate priorities, but that was crafted on the Senate side. And now the bill faces a tricky path to passage in the House.