President Donald Trump’s decision to allow Russia to supply diesel fuel to the United States and global markets triggered pushback from multiple Republican figures on Saturday.

Rep. Brian Fitzpatrick (R-PA) said he will introduce bipartisan legislation “to block any and all purchases of Russian oil” after outlining his support for Ukrainian President Volodymyr Zelensky on social media. Rep. Don Bacon (R-NE) expressed support for the bill, arguing that consumers’ need for lower diesel prices doesn’t justify pressuring Ukraine to stop striking Russian oil refineries, as Trump has done in recent weeks.