WASHINGTON — President Vladimir V. Putin of Russia is most likely continuing to approve and direct interference operations aimed at raising President Trump’s re-election chances, a recent C.I.A. analysis concluded, a signal that intelligence agencies continue to back their assessment of Russian activities despite the president’s attacks.

The assessment was disseminated in support of sanctions imposed this month on Andriy Derkach, a pro-Russian Ukrainian lawmaker who has spread information critical of Vice President Joseph R. Biden Jr. It is consistent with intelligence officials’ warning to lawmakers in January that Russia was interfering on Mr. Trump’s behalf, a briefing that outraged Republicans and eventually helped oust Joseph Maguire from his post as acting director of national intelligence.

The C.I.A. has moderate confidence in its analysis, a lower degree of certainty than its 2016 assessment of Mr. Putin’s preferences, in part […]