Vice President JD Vance arrived in Switzerland to negotiate with Iran about nuclear weapons. The two countries have agreed to pause fighting for 60 days so they can try to work out a deal.

The United States is asking for something big: Iran must stop all nuclear activities. This is stricter than the deal from 2015, when President Obama agreed to let Iran keep some nuclear work if it stayed limited. Now Washington says Iran cannot do any nuclear work at all. Before heading to Switzerland, Vance told reporters the U.S. had enough power to get Iran to agree.

But President Trump also sent a different message. While Vance was going to talk peace, Trump threatened to attack Iran with military force. This might sound contradictory — why talk and threaten at the same time? It's actually a strategy. By saying both things, Trump tries to push Iran to the negotiating table while showing he's willing to fight if talks fail. Trump also explained his thinking at a meeting of world leaders in France on June 17: a long war in the Middle East could wreck the global economy by disrupting oil supplies and shipping routes.

The Problem at Home

But Vance has another problem closer by: Congress. Both Republicans and Democrats dislike the Iran deal, and some senior Republican senators are speaking out against it. Senators Tom Cotton, Bill Cassidy, and Thom Tillis say it's a bad idea. Senator Ted Cruz said giving money back to Iran is "an exceptionally bad idea" — the same worry people had about the 2015 deal, which freed up billions in Iranian money that had been frozen.

Trump's response was blunt. He called the critics "fools" and said some are "jealous, bad people or stupid." That might anger his supporters, but it won't convince Senate votes. If a deal gets made, Congress will have to approve it.

What Makes This Hard

Getting Iran and the U.S. to agree is difficult because the two sides want very different things. For the U.S., Iran's nuclear program is a threat. For Iran, that program is about national pride and power — not just weapons. No Iranian leader can give it up without getting something big in return. The 60-day countdown adds pressure on both sides to look like they're making progress, even if they don't actually agree on the big issues yet.

By sending his vice president to lead the talks, Trump is making a statement: this matters. A vice president carries more weight than a typical diplomat. It also helps Trump — if a deal works out, he takes credit for a major victory. If talks fail, Vance absorbs some of the blame.

The real test is still ahead. The summit in Switzerland can show whether a real agreement is possible, but only if both governments — and their own critics back home — are willing to keep trying.