Sarah Palin has impeccable timing.

The former Republican vice presidential nominee took to her Facebook page Thursday afternoon to warn freshman Republicans in the House that they just might face primary opposition if they cave in to demands by their party to raise the debt ceiling.

“All my best to you, GOP Freshmen, from up here in the Last Frontier. Sincerely, Sarah Palin,” she wrote. “P.S. Everyone I talk to still believes in contested primaries.”

Just two hours later, House Speaker John A. Boehner was forced to postpone the vote on his proposal to increase the debt ceiling at the last minute, apparently facing a revolt among some of those very members.

The House delayed the vote on Mr. Boehner’s bill, moved onto the business of naming post offices, and eventually went into recess.

There is no proof that Ms. Palin’s online missive was even read by any of the wavering Republicans or played any role in helping to stir up the sheep in Mr. Boehner’s flock.

But the former Alaska governor is very good at capturing media attention when she wants it. And refusing to go along with what the establishment — especially the Republican establishment — wants is one of the ways she does it.

In her 4:03 p.m. Facebook posting, she wrote that “I respectfully ask these GOP Freshman to re-read this letter and remember us “little people” who believed in them, donated to their campaigns, spent hours tirelessly volunteering for them, and trusted them with our votes. This new wave of public servants may recall that they were sent to D.C. for such a time as this.”

Good timing.