President Donald Trump posted letters to the leaders of Mexico and the European Union, saying they had not done enough to head off the new tariffs.

The EU will suspend retaliatory tariffs on U.S. goods scheduled to take effect Monday in hopes of reaching a trade deal with the Trump administration by the end of the month.

European leaders have been split on whether the bloc should press for a quick framework trade deal similar to the UK’s or keep negotiating in the hope of achieving a better outcome.