NASHUA, N.H. (AP) — Ties between Florida Sen. Marco Rubio and former Florida Gov. Jeb Bush, political allies for more than a decade, are fraying as the Republican presidential campaign picks up. [...] Bush allies have started quietly spreading negative information about Rubio's record. [...] supporters of the two Miami politicians are drawing contrasts between Rubio, a 43-year-old son of Cuban immigrants, and 62-year-old Bush, a member of one of the nation's most powerful political dynasties. The governor presented Rubio with a golden sword in a ceremony symbolizing a political handoff nearly a decade ago, an endorsement that Rubio's advisers point to when asked about the Bush camp's early aggression now. Rubio's respect for Bush is well-documented in his writings and years of political activity when he relied on Bush's support, donor network and even former staff to help his own rise. [...] Rubio this past week announced his own presidential campaign in their hometown, insisting the stakes were too high for him to "wait his turn." [...] he supported them as a state legislator, these critics point out, in one year alone requesting $43 million in such spending for public works, autism and substance abuse programs. Ross highlighted Bush's aggressive use of the line-item veto to cut government spending, regardless of whether such spending benefited members of his own party.