President Joe Biden’s asylum ban may already be facing a mountain of problems as the administration looks to enforce the order in the coming days and weeks.

Since Biden signed an executive order Tuesday that prohibited migrants from seeking asylum if they show up at the U.S.-Mexico boundary, immigration experts have laid out a myriad of issues with the plan — including possible loopholes that cartels could take advantage of, a lack of funding support an increase in deportations, and exemptions within the order that could be exploited.

Sen. Chuck Grassley (R-IA) predicted that Mexican criminal organizations, known as cartels, are already at work decrypting the new rules to come up with ways around them.