A House plan to overhaul oversight of the government-sponsored enterprises passed the Financial Services Committee with flying colors last month, but it has become apparent that not all GOP leaders are ready to salute the proposal. H.R. 1461 was approved 65-to-5 during a markup session in the Financial Services Committee on May 25. The bill, co-sponsored by Rep. Michael Oxley, R-OH, and Rep. Richard Baker, R-LA, would set up a new regulator for Fannie Mae,…