Shortly before we started taping today’s episode, the Supreme Court handed down decisions in a couple of cases we’ve been watching.

In Watson v. RNC, the court ruled that ballots postmarked by Election Day can still be counted after Election Day in states where that is legal. Nathaniel Rakich of Votebeat explains why the ruling preserves the status quo in more than a dozen states and why Donald Trump is unlikely to stop attacking late-arriving mail ballots anytime soon.

We also discuss another pair of decisions involving independent agencies. The court allowed Trump to fire Federal Trade Commissioner Rebecca Slaughter, but said Federal Reserve member Lisa Cook could remain in her job while she challenges her firing. That suggests the court may be willing to expand presidential control over many independent regulators while treating the Fed as a special case.

Then we turn to the Trump administration’s deal with Iran. Mary Radcliffe of FiftyPlusOne walks us through the polling on the agreement, which shows that Americans generally support efforts to end the war, but are much less sure that the deal will actually work. That leads us into a broader conversation about the national political environment, whether the generic ballot has really tightened, and what a new New York Times poll of the Maine Senate race tells us about the race between Graham Platner and Susan Collins.

Finally, in Good Data, Bad Data or Not Data, we look at a Washington Post analysis arguing that prediction markets are well calibrated. The verdict: not so fast.

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