Industry trade groups, as well as Fannie Mae and Freddie Mac’s regulator, are questioning the wisdom of Congress as lawmakers in both chambers have bills pending to hike the fees charged to guarantee GSE mortgages as a way to help offset the cost of extending the payroll tax cut through 2012.Both House and Senate versions of tax cut extension bills would add an additional 10 basis points to the guarantee fees charged by Fannie and Freddie through 2021. The increase would offset about $35.7 billion in costs, including $1.3 billion in the first year, according to the Congressional Budget Office.As Inside the GSEs went to press, the prospect of any tax cut extension was in doubt after the House rejected the bill calling for a two-month extension. Instead, House Republicans demanded immediate talks with the Senate on a year-long plan but the Senate ruled out further negotiations until the House passes the stop-gap measure.