The former New York City mayor, starting a swing through the first presidential primary state, said he would make up his mind about making another White House run by late summer.

“We didn’t do it the right way” in the last presidential election, Mr. Giuliani told reporters before a speech at an Italian restaurant here. “We were spending so much time trying to raise money that we forgot about the politics,” he said, adding he didn’t spend enough time talking with voters directly…

If Mr. Giuliani does run, supporters say, he would focus his efforts entirely on New Hampshire, meaning three Northeast Republicans with generally moderate profiles could be competing in the state. Aides to former New York Gov. George Pataki have said he is interested in running, and former Massachusetts Gov. Mitt Romney formally began his campaign Thursday.