President Donald Trump on Wednesday said China has been trying to interfere in November’s midterm elections “against my administration.”

“They do not want me or us to win because I am the first president ever to challenge China on trade,” he said during remarks at a United Nations Security Council meeting in New York. “We are winning on trade — we are winning on every level.”

But a senior administration official who briefed reporters Friday on trade matters acknowledged Chinese officials have yet to budge in ongoing trade talks despite the United States repeatedly making clear what Washington wants Beijing to stop doing.

“We don’t want them to meddle or interfere in our upcoming elections,” Trump said of China.

He did not specify just what U.S. officials have detected, but China has targeted its retaliatory tariffs to hit hard in states and districts that went for Trump in the 2016 presidential race.