Ten days ago, the Supreme Court blocked an earlier challenge to Trump’s USPS ballot order because the rule was not final yet.

SCOTUS said the courts did not yet know what the final rule would actually do.

Now the rule exists.

And it does something very concrete:

USPS can refuse to accept ballot mail that does not comply with its new federal requirements.

States must submit approved envelope designs, upload voter names, addresses and barcode data into a new federal portal, and pass USPS verification before ballots are accepted for mailing. Noncompliant batches are returned to election officials to be corrected and resubmitted.

A federal judge temporarily stopped USPS from making those requirements mandatory while the court decides whether USPS actually has the legal authority to impose them.

Now the Trump administration has gone straight back to the Supreme Court asking it to turn that power back on immediately.

Why the rush?

Because North Carolina begins mailing ballots September 4 and Alabama September 9.

The government argues that once those ballots enter the mail without the new checks, the harm to the government is irreparable because the ballots cannot be pulled back and subjected to the rule later.

That is the signal.

The Supreme Court said the first challenge was too early because there was no final rule.

There is one now.

And the question is no longer hypothetical:

Can the President direct USPS to create a new federal gate that can stop states from mailing ballots unless they satisfy requirements Congress never specifically enacted?

We are about to find out.