The leader of a Turkish opposition party on Wednesday urged support for Turkey’s president ahead of his meeting in Washington with his U.S. counterpart.

“Foreign policy is a national policy, you can’t play politics with it,” Mustafa Destici, leader of the Grand Unity Party (BBP), told reporters in parliament.

Destici called for a show of support to Turkish President Recep Tayyip Erdogan, who is scheduled to meet the U.S.’ Donald Trump Wednesday at the White House.

Read more: 'We should support Turkish president on his US visit'