WASHINGTON — President Donald Trump’s persistent overtures toward Russia are placing him increasingly at odds with his national security and foreign policy advisers, who have long urged a more cautious approach to dealing with the foreign adversary.

The uneasy dynamic between the president and top aides has been exacerbated by the revelation this week of an extended dinner conversation between Trump and Russian President Vladimir Putin at the recent summit in Germany.

The previously undisclosed conversation, which occurred a few hours after their official bilateral meeting, raised red flags with advisers already concerned by the president’s tendency to shun protocol and press ahead with outreach toward Russia, according to two U.S. officials and three top foreign officials.

Deep divisions are increasingly apparent within the administration on the best way to approach Moscow in the midst of U.S. investigations into Russian meddling in the American presidential election. Trump has repeatedly cast doubt on the conclusion of U.S. intelligence agencies that the Russian government sought to tip the election in his favor and has dismissed investigations into the possibility of collusion between his campaign and Moscow as a “witch hunt.”

Meanwhile, he has pushed for cooperation between Moscow and Washington on various matters including the raging conflict in Syria.

But some top aides, including National Security Adviser Gen. H.R. McMaster, have been warning that Putin is not to be trusted. An intelligence officer-turned-politician, Putin is known for steering discussions in his own favor.

The three foreign officials who have spoken with top Trump advisers described a disconnect, or “mixed signals,” between Trump and his team over Russia, highlighting a lack of a clear policy. U.S. officials echoed that sentiment, with one saying diplomats and intelligence officials were “dumbfounded” by the president’s approach.

McMaster specifically said he’d disagreed with Trump’s decision to hold an Oval Office meeting in May with top Russian diplomats.