The House on Thursday backed a bill that would require the Obama administration to report weekly on how many Americans have signed up for health care coverage as Republicans maintain an election-year spotlight on the troubled law. The vote was 259-154, with 33 Democrats breaking ranks and joining the GOP majority in supporting the legislation. It marked the second time in a week — and certainly not the last — that the House has targeted President Barack Obama's law, with Republicans confident that Americans' unease with the overhaul will produce major GOP wins in the November elections. Some of the most vulnerable Democrats facing re-election this fall from Arizona, Georgia, New York and Florida voted for the bill.