audience of 1411 people, as you said. but frankly it's not the police's problem or their issue. we talked to the police chief earlier today. they're not thrilled with the trump campaign. they believe they kind of sprung this on them at the last minute. that 20,000 number though may be a touch off. one campaign aide tells me it's about 6,000 people actually who are confirmed with tickets. but still, 6,000 minus 1,400 still leaves a lot of people standing outside in this burlington, vermont cold. donald trump isn't letting go. fanning the flames about ted cruz's citizenship. >> he's got this cloud over his head, i don't think it's going to be possible for him to do very well. >> reporter: today, trump sent a message to his rivals saying, ted, free legal advice on how to preempt the dems on citizen issue, never mind democrats, it's republicans raising questions. all over whether cruz could face a legal challenge. he was born in canada, but his mother was a u.s. citizen. trump told wolf blitzer that cruz's birthplace raises constitutional concerns. >> there's this doubt.