With Vladi­mir Putin expected to win the Russian presidential elections set for Sunday, Brookings scholar Fiona Hill says the United States should be concerned that the U.S.-Russian relations reset under current president Dmitry Medvedev is at risk.

“The rhetoric of [Putin’s] campaign has been very nasty,” says Hill. “Anti-Americanism is always an old tool in the toolkit for Russian politics,” she said, adding, “Now, during this campaign, Putin has put U.S. right back up top as enemy number one.”