Russian President Vladimir Putin still wants to seize most of Ukraine, but his forces are so degraded by combat that they likely can only achieve incremental gains in the near term, the top U.S. intelligence officer said Wednesday.

Director of National Intelligence Avril Haines, outlining the current U.S. intelligence assessment of the more than four-month war, said that the consensus of U.S. spy agencies is that it will grind on “for an extended period of time.”