about to take the stage. >> reporter: add kinson, new hampshire. people waiting to see donald trump. he is trailing ben carson in the polls in iowa. he is sharpening his attacks, calling ben carson a low energy seventh day add venntist is. let's listen to what trump had to say on "state of the union" with jake tapper over the weekend. >> i think ben carson is a low energy person. actually, i think he's lower energy than jeb bush. we need strong energy. i did talk about jeb because i thought he was going to be the front-runn front-runner. obviously he's not, so i won't talk about him so much anymore. >> carson said his energy levels