KIMBERLY STRASSEL: Democrats Send Their Regrets.

Cue Sinatra and “My Way.” That’s how former Senate leader Harry Reid, House Democratic leader Nancy Pelosi and President Obama ruled for eight years. They planned each charted course, each careful step. Now, they’re not finding it so amusing.

Mr. Coons is regretting giving up his tool to stop Donald Trump’s march of reformers. It’s a cabinet parade of charter-school-lovers, and law-and-order prosecutors and tax-cutters and ObamaCare-slayers, of the sort to give a good Delaware liberal night sweats. There was a day when not one of these nominees could have hoped to squeeze past a Senate filibuster. But Mr. Reid did it his way, and Mr. Trump keeps tweeting.

Former veep candidate Tim Kaine in October threatened that Republicans would be really, really sorry if they tried use what filibuster tools were left against a Hillary Clinton Supreme Court nominee. If Republicans “stonewall,” then a “Democratic Senate majority will say we’re not going to let you thwart the law,” he declared in October. Incoming Senate Democratic leader Chuck Schumer is now regretting that belligerence, and insisting that the Supreme Court filibuster is inviolate, and that his party never did kill it, you know, and that should count for something, and . . . blah, blah, regrets.

It would be hard to stall the confirmation process, at least after Minnesota Sen. Amy Klobuchar’s regretful September news conference, the one where she stood tall and hit Republicans for refusing to confirm Mr. Obama’s end-of-the-road nominee, Merrick Garland. “This is not just some TV show [like] ‘Eight is Enough.’ Eight is not enough on the United States Supreme Court,” she railed. She’s joined in regret by the activists behind those trendy Twitter campaigns: #weneednine. #doyourjob. Bring on Mr. Trump’s own Tweetbomb: #likeyousaid.

They have a lot to regret. They’ll have much more.

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