WASHINGTON (AP) — President Donald Trump said Friday that his director of national intelligence, Tulsi Gabbard, was “wrong” when she previously said that the U.S. believed Iran wasn’t building a nuclear weapon, and he suggested that it would be “very hard to stop” Israel’s strikes on Iran in order to negotiate a possible ceasefire.

Trump has recently taken a more aggressive public stance toward Tehran as he’s sought more time to weigh whether to attack Iran by striking its well-defended Fordo uranium enrichment facility. Buried under a mountain, the facility is believed to be out of the reach of all but America’s “bunker-buster” bombs.