A Mexico senator has suggested his country cut back on collaboration with the U.S. on fighting terrorism and stop buying American corn in retaliation for a border tax President Donald Trump floated this week.

Mexico Sen. Armando Ríos Piter told MSNBC he was on his way to an emergency meeting with Mexican lawmakers to discuss the rift that opened up this week between the neighboring countries. Already tense relations escalated over Trump's continued insistence that Mexico pay for a wall on the border and his declaration that he'd levy a border tax to finance the project.

"We should stop collaborating with the United States, with this hostile administration specifically, regarding security issues, regarding anti-terrorism that we've been working together (on) for the last years," Pitter said.