"We are working every day to ensure his release. We are looking for opportunities and tools to bring him home. We remain hopeful," TASS quoted him as saying.
Biden assured that he and his administration "will not stop fighting."
Earlier it was reported about the meeting of the American leader with the Hershkovich family.
The journalist was detained in Yekaterinburg on March 30. According to the FSB of Russia, on the instructions of the United States, he collected information about the activities of one of the enterprises of the Russian military-industrial complex.
The Russian Foreign Ministry reported that in connection with the disruption of the issuance of visas to media representatives from the journalistic pool of Foreign Minister Sergei Lavrov, who were supposed to accompany him on a trip to New York as part of the Russian presidency of the UN Security Council, it was decided to reject the request of the US Embassy for a consular visit to WSJ journalist Evan Gershkovich on May 11.