The message seemed to be ?I?m energized? as he zipped to and fro with a bedraggled group of photographers and reporters in his wake. There he was, signing the shirt of Bobby Grogis, 11, (?Awesome!? the lad exclaimed) or whipping supporters into a rousing rendition of ?Hooray for Romney,? adding, ?This is the song they sang during my dad?s campaign, and it worked.? (Mr. Romney?s father, George Romney, was the governor of Michigan and ran for president in 1968.)

But it was one hot and sometimes muggy day, and by the time Mr. Romney finished his first parade, in Amherst, his blue Boston Red Sox shirt and brown pants were soaked. ?Maybe next time I won?t wear my long underwear,? he joked to his supporters.

Not to worry, though. By the time Mr. Romney arrived here in Laconia, he was in a fresh blue shirt and khakis and could pose with confidence beside JoAnn Marchant, who was wearing a tiara and a ?Mrs. Woman New Hampshire? sash.

As he came to the end of the parade route after 4 p.m., he was even ready for more. ?Where?s the next parade?? he asked. But there were no more, so he could go home.