Housing industry groups continue to wrangle over whether drawing a “bright line” between the primary and secondary markets would prevent Fannie Mae and Freddie Mac from providing key services for small lenders. The provision is included in proposed legislation introduced in January by Sen. Chuck Hagel, R-NE. The bill, S. 190, calls for a new GSE agency to establish a more exact firewall between the secondary market and the primary market. Section 107, widely dubbed…