JPMorgan Chase & Co., Citigroup, HSBC, Prudential and MetLife are among the big banks and insurers that have had more than half a dozen meetings to lobby lawmakers in just the last 10 days. The firms are trying to get out ahead of amendments that Reps. Paul Kanjorski (D-Pa.) and Ed Perlmutter (D-Colo.) are drafting to sweeping financial overhaul legislation under debate in the House Financial Services Committee. The amendments have not been introduced yet, but their authors aim to give the government greater powers than the Obama administration had originally proposed to limit the size and scope of the country’s biggest financial companies. The government might be able to step in even if the firms are not on the verge of failing.