Is selective memory loss a pre-existing condition?

Embattled incumbent Rep. Bruce Poliquin, R-Maine, stands accused of voting against health care for more than 100,000 Mainers. “To clarify,” a reporter for the local ABC affiliate asked Poliquin recently, “did you vote to repeal the Affordable Care Act?”

“No,” Poliquin said. “I voted for a replacement plan.” He went on to claim he was “one of three Republicans in the country” against repealing Obamacare without a replacement.

Alas for Poliquin, the image on screen switched to the House floor, with a voice-over: “Poliquin did vote for the ACA repeal bill.”

Indeed, Poliquin helped the American Health Care Act, the repeal bill even President Trump later described as “mean,” clear the House by four votes. It would have weakened protections for those with pre-existing conditions.

It wasn’t Poliquin’s first attempt at airbrushing his past. His website, which in 2016 promised to “end Obamacare,” has now struck that language in favor of “protecting our hospitals and health care access.”

Poliquin is part of an elaborate attempt at a midterm hoax: Republicans convincing the public that they did not try to repeal Obamacare and its pre-existing-conditions protections, and that they would again not do so if re-elected.

With the Affordable Care Act hitting record support in a recent Fox News poll, and pre-existing-conditions protections remaining overwhelmingly popular, congressional Republicans have recently sought inoculation by introducing various proposals they say would protect people with pre-existing conditions. And they are vigorously scrubbing their records, according to archived versions of their websites reviewed by the Democratic Congressional Campaign Committee.

The website of Rep. Tom MacArthur, R-N.J., vowed last year: “Tom will work to repeal Obamacare, but won’t stop there.” Now “Tom opposed his own party’s efforts at a speedy Obamacare repeal.”

Rep. Ted Budd, R-N.C., in 2016, had a pledge: “I will do everything I can to repeal every word of Obamacare.” That passage is now repealed from his website.

Their problem: Of the 73 incumbent House Republicans in competitive races, 67 voted at least once to eliminate Obamacare’s protections for those with pre-existing conditions, according to an analysis by the liberal Center for American Progress Action Fund.

Last week, Senate Majority Leader Mitch McConnell, R-Ky., revived the prospect of repealing Obamacare after next month’s midterm elections, telling Reuters: “If we had the votes to completely start over, we’d do it. But that depends on what happens in a couple weeks.”

Republicans and the Trump administration have done everything short of full repeal to sabotage Obamacare. Last week, the administration tapped to run the Medicaid program Mary Mayhew, a former Maine health commissioner who fought Obamacare’s Medicaid expansion – even defying a voter referendum.

The former hospital lobbyist boasted that Medicaid enrollment fell 24 percent on her watch. A federal investigation found that Mayhew’s department didn’t investigate 133 deaths of Medicaid beneficiaries with developmental disabilities.

Yet, embattled Republicans now ask voters to ignore the past. Attorneys General Josh Hawley of Missouri and Patrick Morrisey of West Virginia both joined a lawsuit that would eliminate protections for pre-existing conditions but now, as Senate candidates, they both claim to support such protections.

In Arizona, Republican Senate candidate Martha McSally said, “I voted to protect people with pre-existing conditions.”

But on the eve of the big repeal vote last year, McSally reportedly urged her House GOP colleagues to get this “f—-ing thing done.”

Gone from the website of Rep. Lee Zeldin, R-N.Y., is his boast that he “secured full congressional passage for the first time of legislation to repeal and replace Obamacare.” In its place: “member of the House bipartisan task force to combat the heroin epidemic.”

Struck from the website of Rep. John Carter, R-Texas, is his announcement that “I will not apologize for continually voting to delay, defund, and dismantle Obamacare.”

In lieu of the promise from Rep. John Faso, R-N.Y., that “I will seek to repeal and replace Obamacare” is a claim that “John is working to reform our health care system with commonsense solutions.”

Rep. David Joyce, R-Ohio, before: “Dave Joyce has fought to defund, repeal or delay ‘Obamacare’ every chance he’s had, 30+ times.” Joyce, now: “Dave has been a strong advocate in the fight against the opioid epidemic.”

Similar cases have been reported in California, Kansas, Iowa, Illinois, Minnesota, Virginia, Pennsylvania, Indiana, Montana and North Dakota. This raises a frightening epidemiological possibility: Selective memory loss is spreading, and it has become a necessary pre-condition to run as a Republican this year.

Dana Milbank is a columnist with the Washington Post Writers Group. Follow him on Twitter, @Milbank.