President Obama , and Romney call for fully enforcing existing gun laws . Obama spokesman attacks Congress for inability to renew an expired assault weapon ban . ` ` I do n't support new gun laws , '' Romney told CNN . Threats before , after other 'Dark Knight ' showings , authorities said . Last week 's mass shootings reignite the gun control movement .
President Obama , and Romney call for fully enforcing existing gun laws . Obama spokesman attacks Congress for inability to renew an expired assault weapon ban . ` ` I do n't support new gun laws , '' Romney told CNN . Last week 's mass shootings reignite the gun control movement .