US Democrat Senator Chris Van Hollen stated that Turkey was crossing another red line on S-400s.

Hollen poster the following comment on Twitter on the recent developments involving Turkey:

“Two weeks after his Washington visit, Erdogan is thumbing his nose at Trump, the U.S. + NATO, and crossing another red line on S-400s.

Existing law requires Trump to impose sanctions. Pompeo must also confront Turkey about its latest ‘safe zone’ violations and attacks against the Kurds.”