Ricky Martin will perform at the 2014 Latin Grammys on Thursday night. Univision will take a break in the show to broadcast President Obama's speech on immigration reform. (Ronald Zak/AP)

This item has been updated.

President Obama's announcement Thursday night of his plans to overhaul the nation's immigration system is scheduled to happen at an opportune time -- at least if the White House is hoping to reach a captive audience of Hispanic television viewers.

Obama's 8 p.m. Eastern time announcement will come at the start of the second hour of the 15th annual Latin Grammys, which begins at 7 p.m. Thursday on Spanish-language TV network Univision. At least 9.8 million viewers tuned in to all or part of last year's telecast, meaning Univision defeated CBS, Fox and NBC that night.

Univision says it will postpone part of the awards show to air Obama's speech, while the big four TV networks, ABC, CBS, Fox and NBC, currently have no plans to air the address. Telemundo, usually the second-ranked Spanish-language national network, also plans to air Obama's speech followed by a special news program, a spokesman said.

Told about the scheduling coincidence by a pack of reporters, Sen. John Cornyn (R-Tex.) the second-ranking GOP senator, said, "Talk about a major pander."