Two ex-Mexican Presidents compare Trump to Hitler

Donald Trump's political rhetoric has been compared to Adolf Hitler. Credit: Fort Worth Star-Telegram / ABACA/PA Images

US Republican presidential front-runner Donald Trump has been compared to Adolf Hitler by two former Mexican presidents.

Felipe Calderon told reporters at an event in Mexico City Trump's political rhetoric is "racist," and evocative of Hitler.

"This logic of praising the white supremacy is not just anti-immigration," Calderon said.

He added: "He is acting and speaking out against immigrants that have a different skin color than he does, it is frankly racist and [he is] exploiting feelings like Hitler did in his time."

Trump has accused Mexico of sending rapists and drug runners across the US border and has said he will make Mexicans pay for a wall on the border.

Former Mexican President Vicente Fox, Calderon's predecessor, also compared Trump to Hitler in an interview with Anderson Cooper on CNN.

"He reminds me of Hitler," Fox told Cooper.