A former U.S. ambassador to Mexico said Sunday that President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s rhetoric toward Mexicans “absolutely” made it more difficult to implement his administration’s policies.

Roberta Jacobson, who retired as ambassador to Mexico after roughly two years on the job, said on CBS’s “Face the Nation” that while she loved her job, it became “increasingly difficult” under the Trump administration.

“Every time you try to do something … on any of the most important issues to us — education, etc. — things would get blown up by a tweet,” she said.

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"There were many people in government trying to do the right thing because this partnership is important to Americans,” she continued. “And yet it just never seemed that we could overcome the retreat into the vilification of Mexicans at a rally or a tweet.”

The former US Ambassador to Mexico explains why she left the Trump Administration:



Jacobson: It just never seems that we could overcome the retreat into the vilification of Mexicans at a rally or a tweet. pic.twitter.com/wnfaQAg5Rt — Face The Nation (@FaceTheNation) July 1, 2018

Jacobson departed her post in May, shortly after Secretary of State Mike Pompeo Michael (Mike) Richard PompeoTreasury sanctions individuals, groups tied to Russian malign influence activities Navalny released from hospital after suspected poisoning Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE was confirmed to lead the State Department.

She has since criticized the Trump administration's policies on immigration as "counterproductive," and said they are hurting the U.S.'s standing in the world.

Trump has drawn criticism for his rhetoric toward Mexico since he hit the campaign trail in 2015.

He said at his campaign launch that Mexico was sending "rapists" and criminals" across the border into the U.S., and has repeatedly claimed that Mexico would pay for his proposed border wall between the two countries. Mexico has said it will not pay for the wall.

Trump has also threatened to terminate the North American Free Trade Agreement with Mexico and Canada, further deepening tensions between the two countries.