By Hannah Rabinowitz, CNN (CNN) — Rep. Henry Cuellar’s former campaign manager and another political operative have agreed to plead guilty to federal crimes and are cooperating with the Justice Department’s prosecution of the Texas Democrat, according to court documents unsealed Wednesday. Mina Colin Strother, Cuellar’s former campaign manager and former chief of staff, and Florencio “Lencho” Rendon, a political consultant and businessman from Read this story