Congress still has a long way to go before resolving the most significant overhang that remains from the 2008 financial crisis. But a consensus is emerging around principles for overhauling Fannie Mae, Freddie Mac and the U.S. mortgage-finance system. Senators Bob Corker and Mark Warner have been working on a bill for months, and they intend to start sharing ideas and legislative text with other senators and the Trump administration in the coming weeks, said people familiar with the matter. Their plan would preserve Fannie and Freddie but take steps to make it easier for investors or other companies to create competitors, the people said. The two lawmakers want to introduce a bill by early next year.