All but the biggest U.S. banks could see relief from some financial reforms after the November elections even if control of the U.S. Congress remains divided between Democrats and Republicans. Post-election committee leadership changes and growing momentum behind bipartisan fixes may lead to tweaks to the 2010 Dodd-Frank law for the smallest community banks, larger firms such as PNC Financial Services (PNC.N) of Pittsburgh and Regions Financial (RF.N) of Birmingham, Alabama, and insurers, lobbyists and congressional staffers said.