Trump has threatened to veto the spending bill if it contains the amendment.

“I would hope he wouldn’t veto it just based on that,” Grassley said of Trump.

Grassley raised the possibility that the issue of renaming bases could be considered separately from the full defense spending bill but said he believes Congress has the votes to override a presidential veto if it comes to that.

“If it came to overriding a veto, we’d probably override the veto,” he said.