WASHINGTON - Russian President Vladimir Putin has lashed out at U.S. politicians whipping up what he described as "anti-Russian sentiment" for being either "stupid" or "dangerous."

Speaking at a joint news conference with the visiting Italian prime minister, Putin said on Wednesday Moscow initially found debates about Russia's meddling in U.S. politics as "funny" but said Moscow is now "concerned because it's hard to imagine what the people who produce such nonsense can come up with next."

Putin dismissed the U.S. politicians, whom he did not identify, as either being "stupid" or "dangerous and unscrupulous" who are wittingly "causing the damage to their own country."

Asked what he thinks of Trump presidency, Putin said it's up to the American people to judge but his performance can only be rated "only when he's allowed to work at full capacity," implying that someone is hampering Trump's efforts.