Speaking to real estate agents, bankers and brokers frustrated with a four-year housing slump, U.S. Sen. Bob Corker, R-Tenn., criticized heavy-handed government regulation and pledged to take a leading role in planning the future of home loan financing. “Regulators are over-regulating,” Corker said Tuesday at a housing panel he convened at the downtown Nashville library. “When times are good they get too loose and happy. Then things happen, there are bank failures and they over-regulate. I think that’s what happening in Tennessee.” Brokers at the meeting complained of difficulty getting even good borrowers approved for home loans. One complained: “The medicine has been killing the patient.” Corker, a member of the Senate Banking, Housing and Urban Affairs Committee, said he was open to suggestions on how to reform home loan financing, in particular, mortgage giants Fannie Mae and Freddie Mac.