> In recent decades, presidents have frequently entered the United States into international agreements without the advice and consent of the Senate. These are called "executive agreements." Though not brought before the Senate for approval, executive agreements are still binding on the parties under international law. [0]
An EU law is an international treaty. Can the Senate kick out the US president and refuse to agree to the treaty he signed?
[0] https://www.senate.gov/about/powers-procedures/treaties.htm
Also between the date something pass at EU level and during the delay to transfer directive governments changes, parliament electives can be reelected, etc.
"Regulations and decisions become binding automatically throughout the EU on their date of application. However, they may require changes in national legislation, and may require implementation by national agencies or regulators."
"Directives on the other hand, must be incorporated by EU countries into their national legislation. Each directive contains a deadline by which EU countries must incorporate its provisions into their national legislation and inform the Commission to that effect."
source: https://commission.europa.eu/law/law-making-process/applying...
That doesn't mean they have the right to ignore the directive and not decide on a law but there is definitely more leeway.