President Obama , Congress call for fully enforcing existing gun laws . Mitt Romney spokesman blames Obama for inability to renew an expired assault weapon ban . `` I do n't support new gun laws , '' Romney tells Obama . Threats before , after other 'Dark Knight ' showings , authorities said . Last week 's Oklahoma City shootings reignite the gun control debate .
President Obama , Congress call for fully enforcing existing gun laws . Mitt Romney spokesman blames Obama for inability to renew an expired assault weapon ban . `` I do n't support new gun laws , '' Romney tells Obama . Last week 's Oklahoma City shootings reignite the gun control debate .