At his weekly news conference Tuesday, Senate Majority Leader Mitch McConnell stood by Speaker Paul D. Ryan’s remarks earlier in the day suggesting policy riders may be part of a year-end spending bill, while sidestepping whether “controversial” riders would be included.“Riders in appropriation bills are quite common. The Democrats will have some too,” McConnell said. “Of course there will be some riders in the appropriations bills. I’m having a hard time remembering one that didn’t.”