President Donald Trump's frustration at trying to get peace in Ukraine is growing as ending a war that raging over three years continues to throw up difficulties.Newsweek has contacted the White House for comment.

The U.S. has expanded its sanctions on Russian companies while simultaneously removing restrictions on the wife of Boris Rotenberg, a close associate of Russian President Vladimir Putin, the U.S. Office of Foreign Assets Control reported on April 2.

A Kremlin spokesman says Russia views efforts to end its three-year war with Ukraine as “a drawn-out process,” after U.S.