The enterprise most responsible for sending Congress down the path of GSE reform is digging in its heels to avoid an unfavorable bill at the eleventh hour of the legislative process. About two years ago, Congress began talks in earnest about improving oversight of Fannie Mae, Freddie Mac and the Federal Home Loan Banks after an accounting meltdown at Freddie resulted in a $5 billion restatement. At the company’s annual meeting last week, Freddie Chairman…