Hillary Clinton is finally "hitting her stride" as a presidential candidate, says Geoff Garin, who recently replaced the abrasive Mark Penn as her chief strategist. Garin said in an interview that, as the Democratic race proceeds to Indiana and North Carolina this week, she will only gain strength as rival Barack Obama is thrown increasingly off balance. Garin argues that by early June, when the final nine nominating contests are over, the race will be "very, very close" in both delegates and popular votes. At that point, the superdelegates will be focusing on the "qualities of the candidates" and what it will take to win in November, Garin says. Clinton will, in the end, show that she can best defeat McCain, Garin says.