Nightly News | July 22, 2012
>> as we have seen following mass shootings in the past tonight there are renewed calls for tougher gun laws from some lawmakers across the country, the topic of gun control hasn't come up much during this presidential campaign year but suddenly is thrust into the spot light.
>> reporter: in the after math of the tragedy a call for both presidential candidates to take a stand on guns.
>> and it is time i think that we hold them accountable and say you want our votes, what are you going to do?
>> reporter: also a push for a new assault weapons ban .
>> pure and simple, weapons of war don't belong on the streets.
>> reporter: gun control measures have been losing political support. in a recent poll more say protecting gun rights is more important than controlling gun ownership that caps a two decade trend. as a candidate president obama backed a ban on assault weapons .
>> don't tell me we can't uphold the second amendment while keeping ak-47s out of the hands of criminals.
>> reporter: while mitt romney signed an assault weapons ban he says he opposes new restrictions.
>> because our politicians are not defending the safety of the american people .
>> reporter: friday's mass killing has reignited the debate.
>> this is an issue about sick demeanted individuals. it is a tragedy. i don't think there is a solution in washington to solve the problem.
>> reporter: this as colorado's governor questioned if anything could stop a man bent on murder.
>> you look at this person as again almost a creature. if he couldn't have gotten access to the guns what kind of bomb would he have manufactured?
>> reporter: there is a bottom line consensus here in washington today. we are unlikely to see new gun control legislation coming out of congress this election year.
>> we will have much more from aurora, colorado tonight on a special edition of "date line." at 7 eastern, 6