A senior adviser to the Iranian president took aim at President Trump, seeming to threaten him and his real estate empire.

Hesameddin Ashena tweeted a link to Forbes’s estimate of Trump’s real estate assets before following up with a direct message to the president. “We have ZERO problems with the American people,” he said. “We even achieved deals with previous US administrations. Our sole problem is Trump. In the event of war, it is he who will bear full responsibility.”