Pedro Marin has American challenger
Despite being a Puerto Rican and a member of the Georgia house, Pedro Marin has some questionable associations with the Mexican government. They might all be innocent, or they might bit as bad as they appear and the news media is just unwilling to do their job.
Speaking of which, the AJC's Brian Feagans offers an overview of the race between Marin and his 22-year-old challenger, Torriel "Torry" Lewis. Based on Marin's history, he could be a 4-year-old polar bear and I'd recommend voting for him.
As for Marin, he recently helped organize the illegal immigration march and boycott in his state. Another organizer is a former Mexican consul general.
And, as detailed here, he is or was employed as the director of the Mexican Center Of Atlanta at $50,000 per year. (Bear in mind, of course, that he's not of Mexican descent.) That Center was previously housed at the Mexican consulate in Atlanta, and former employees of the Center were consular officials. Apparently shortly before he was selected as director, they were moved out of the consulate. Whether they have any remaining links to the government of Mexico is unknown.