WASHINGTON (AP) — The House Republican campaign committee raised almost $10 million in March and has $31.2 million banked to defend the party's majority, according to financial reports filed Sunday. Democrats face a steep climb to reclaim control for the first time since tea party-aligned candidates helped put the GOP back in power after the 2010 elections. Heading into Sunday's filing deadline for groups that disclosure their finances every month, Democrats appeared to be raising more cash than Republicans. The group, which often challenges GOP leaders' preferred candidates, has raised almost $9.7 million so far this cycle and has spent $9.4 million, according to filings ahead of Sunday's midnight deadline. Among groups that reliably support Democrats, the Service Employees International Union's Committee on Political Education raised another $1.2 million from union members' voluntary donations during March. All told, Democrats' outside groups and committees had about a 30 percent advantage over what Republicans had reported, although GOP groups such as Americans for Prosperity operate under rules that let them delay reporting.