Longshot Republican presidential hopeful George Pataki is calling on other GOP candidates to denounce Donald Trump after his controversial comments on Mexican immigrants.

{mosads}Pataki, the former New York governor, pans Trump in a letter to the likely GOP field for comments that Mexicans coming to the U.S. illegally are not that country’s “best.” Trump said during his campaign announcement that some are bringing drugs and crime, while some are also “rapists.”

Pataki recalls the slurs that Irish and Italian immigrants faced when they came to America.

“This type of divisive rhetoric is just wrong. It was wrong 100 years ago and it’s wrong today,” he writes.

“Yet here we are in 2015 and a leading candidate for the GOP nomination for president is calling Mexicans criminals, rapists and drug dealers. This is unacceptable.”

He also criticizes Republicans for talking the talk on reaching out to Hispanic immigrants but staying “silent when it comes to denouncing these sad and divisive remarks.” Pataki specifically cites the candidates that speak “some Spanish,” including former Gov. Jeb Bush (Fla.) and Sen. Marco Rubio (Fla.), and those who “boast about ‘telling it like it is,’” the slogan for Gov. Chris Christie (N.J.).

“The next President of the United States will represent all Americans. We won’t win by dividing Americans against one another and we certainly can’t govern effectively doing so,” he writes.

“As Donald Trump doubles down, I’m asking you to join me in standing up. Stand up for our party, for the ideals that made America great, and stand for the basic decency and integrity entitled to every American, no matter their heritage or nationality.”

While Trump has soared into second place in a national Fox News poll after he jumped into the race, Pataki isn’t in the top 15 of Republican candidates, according to a RealClearPolitics average of recent polls.