On Sunday afternoon, Bush campaign manager Danny Diaz convened top aides for an afternoon conference call in which he told them to expect “dirty tricks” from the Rubio campaign in the run-up to voting here, according to one source on the call.

The source said Diaz, a hard-charging veteran operative, was not more specific.

The conference call came as the Huffington Post reported that a pro-Rubio super PAC had sent out a mailer in the state that highlights remarks from Bush’s mother, former First Lady Barbara Bush, that the country had grown tired of political dynasties.