European Union (EU) officials are analyzing hundreds of executive orders and sanctions imposed by US President Joe Biden amid growing concern that US President-elect Donald Trump will rescind them once he comes to power on January 20, potentially upending foreign relations and trade, reports Financial Times.

Brussels is worried that Trump could seek to overturn his predecessor’s decisions simply because they were taken by Biden, without much consideration about the impact of such moves on European allies.

Senior European Commission officials have ordered a review of Biden’s orders to work out which reversals could have the biggest impact on the bloc or undermine its own measures, according to three people briefed on the initiative

The EU’s biggest concern is that Trump reverses Biden’s multiple executive orders that imposed sanctions on Russia for its war in Ukraine since 2022, the officials said. The bloc’s officials hope Trump will keep those sanctions in place to use as potential leverage in any possible negotiations with Moscow over a ceasefire.

Executive orders are only issued by presidents, and can be revoked at any time, Financial Times added. It is typical for a new president to review existing orders soon after taking office. In 2017, Trump rolled back the Cuba thaw enacted by his then-predecessor, Barack Obama, and pulled out of the Paris climate accord. A year later, he ended the US’ participation in a nuclear deal with Iran brokered by the Obama administration.