President Trump said Friday that even Pocahontas, his nickname for Sen. Elizabeth Warren, believes Hillary Clinton rigged the Democratic primary in her favor last year, and said the FBI should investigate.

"Pocahontas just stated that the Democrats, lead by the legendary Crooked Hillary Clinton, rigged the Primaries!" Trump tweeted. "Lets go FBI & Justice Department."

Warren, D-Mass., said "yes" on Thursday when asked if she believes the Democratic National Committee was rigged in Clinton's favor.

Her answer came after former DNC Chair Donna Brazile wrote in a new book that Clinton took over the DNC months before she claimed the nomination. Brazile saw that move as "unethical" and said it amounted to corruption.

Trump calls Warren Pocahontas because Warren claims she is part Native American. Warren admitted she considered herself a minority, but claimed she never leveraged her heritage in order to get a job.