It is unclear what retaliatory steps Mexico could take if the border tax is approved, because exports to the U. S. are essential to the Mexican economy.

目前还不清楚如果边界税的措施被批准，墨西哥会采取什么样的报复行动，因为向美国出口是墨西哥经济的重要来源。

youdao

The following day, Secretary of State James Baker announced that the Bush Administration is actively considering retaliatory steps in the economic portfolio where the Soviets might benefit more than the United States.

CENTERFORSECURITYPOLICY: "Potemkin" Economic Sanctions, Take II

The theory usually is that, even though such a party can be reasonably sure that its cheating would not be detected, it will, nonetheless, be deterred from doing so by the threat that other signatories will take unpalatable retaliatory steps.

CENTERFORSECURITYPOLICY: Center for Security Policy | Submitted Testimony Of Frank J. Gaffney, Jr. Before A Joint Hearing Of The Senate Governmental Affairs Committee And The Permanent Subcommittee On Investigations