WASHINGTON — Nearly two years after a Wall Street meltdown left the economy reeling, the House on Wednesday passed a massive overhaul of financial regulations that would extend the government's reach from storefront thrifts to the executive suites of Manhattan.

Senate support for the far-reaching bill remained in flux, however. The Senate was forced to delay its vote to mid-July, denying President Barack Obama a victory before Independence Day. Democrats struggled to secure the votes of a handful of Republican senators even after meeting their demands and backing down on a $19 billion tax on big banks and hedge funds.

The legislation, swelling to more than 2,000 pages, would rewrite the nation's regulatory books. Simple supermarket purchases and exotic derivatives trades would be subject to new laws.