Russian traditional Matryoshka wooden dolls with images of Russian President Vladimir Putin, U.S. President Donald Trump and his predecessors are on sale at a gift kiosk in a street in Moscow, Russia February 22, 2017. REUTERS/Sergei Karpukhin

WASHINGTON (Reuters) - U.S. Senate Democratic Leader Chuck Schumer on Monday called on the Department of Justice’s inspector general to probe any possible political interference in its investigation of contacts between President Donald Trump’s associates and Russia.

In a letter to the department’s inspector, Schumer urged an “immediate investigation into whether there has been any political interference with an ongoing ...(DOJ) investigation related to President Trump’s campaign, transition, and administration’s contacts with the Russian Federation and attempts of Russia to interfere with the 2016 United States election.”