The son of the late Sen. John Heinz III (search) had stumped for Kerry during his unsuccessful presidential bid last year, sparking rumors that Heinz would follow that with his own campaign against U.S. Rep. Melissa Hart (search). Heinz, 32, is the youngest of John and Teresa Heinz Kerry's three children.
"I'm definitely not doing it in 2006. I've thought about it in my life, but it's just not right at this particular time," Heinz told The Associated Press by phone from New York City, where he lives.
During the presidential campaign, the curly, dark-haired Heinz was often compared to John F. Kennedy Jr. in looks and lineage. He was named one of last year's 50 hottest bachelors by People magazine.
Just before last year's presidential election, Heinz registered as a Democrat in the Pittsburgh suburb where his family has a home.
A Yale graduate with a master's degree in business administration from Harvard, Heinz said he is working with some friends in private equity to develop businesses.