Former Secretary of State Hillary Clinton derided the Trump administration’s handling of high-stakes peace talks with Iran, calling the effort led by Vice President JD Vance “a joke” and questioning the administration’s ability to conduct serious diplomacy.

Clinton made the comments on MS Now’s Morning Joe on Monday after Vance and previous lead negotiators Steve Witkoff and Jared Kushner returned home from Islamabad, Pakistan, following over 15 hours of discussions that ultimately failed to reach a peace deal.