Vice President JD Vance says the Trump administration’s effort to economically isolate Iran is working, as the White House ramps up pressure on Tehran in an attempt to force the Iranian government back to the negotiating table.

On the latest White House Briefing Room with Jon Decker, Vance responds directly to Decker’s question about Operation Economic Outcast, the U.S. campaign aimed at cutting Iran off from global trade and finance. But a major obstacle remains: China buys more than 80 percent of Iran’s oil exports, and both China and Pakistan say they will not comply with U.S. sanctions.

Meanwhile, President Donald Trump is taking his fight over mail-in voting back to the Supreme Court. The administration is asking the justices to allow new rules requiring states to provide voter data and giving the U.S. Postal Service authority to reject mail ballots that fail to meet certain conditions. The legal battle comes as states prepare to begin sending ballots for the November midterm elections.

Plus, Trump names Adam Telle as acting Army Secretary following Dan Driscoll’s resignation, and excavation work is expected to begin within weeks on the president’s proposed 250-foot triumphal arch in Washington, D.C., despite an ongoing legal challenge.