At oil services firm, Romney says president is 'insulting' to business

Republican presidential challenger Mitt Romney was in a fighting mood Tuesday after being on the defensive for days, telling a crowd at a Pennsylvania oil and gas services company that President Barack Obama had insulted the business community. A key Romney supporter questioned Obama's patriotism.

The former Massachusetts governor was intensifying attacks to counter blazing political assaults on his history as the head of a private equity firm and his refusal to release more of his tax returns, as other presidential candidates traditionally have done. Democrats and a growing number of Republicans, have urged Romney to release more of his tax records.