I dont think he'll start any gun legislation just because they march. But such a march will scare soccer moms and other voters, who will suddenly be motivated to show up in polls in Nov 2010.
And if some people at the rallies use the guns dangerously, and a pattern emerges, then surely obama will have more reign to start limiting weapons at any protests - and ppl will back it.
So I'm not saying a gun ban - but rather, further restrictions. And, swing voters will start to feel that anti-gun sentiment that allowed the brady bill years ago.
I'm not kneepadding for obama here - I would like to see repubs win the house and I would like to see OBama actually have to work in a bipartisan manner WITHOUT the open wallet he has now.