Fannie Mae and Freddie Mac expressed more contrition for their companies’ political and financial indiscretions on Capitol Hill this week than they have in recent memory. But both companies are still poised to resist tough regulatory oversight that could restrain their investment activities. “There’s no question we’ve ‘cried wolf’ in the past,” said Freddie Mac Chairman and CEO Richard Syron, during a hearing this week before the Senate Banking, Housing and Urban Affairs Committee. “However,…