Will voters punish moderate Democrats in swing districts for an impeachment vote? Conventional political wisdom says yes. But our reporter found that in one former Republican stronghold that may not be the case.

With Bing Crosby crooning and sleigh bells jingling over a sound system, Becky Haslett attended last week’s holiday open house for Rep. Gil Cisneros with a broad smile. He is one of seven Democrats who flipped House seats from red to blue in California last year.

When Ms. Haslett got her face-to-face opportunity with her congressman, she enthusiastically thanked him for backing impeachment. “He said, ‘Thank you, and I will do my duty. Politics aside, whatever happens, it’s the right thing to do.’ So I said, ‘Yaaaaaaay!’” she recounted, with a sparkle that matched the vintage rhinestones pinned to her powder-blue sweater.

For freshman Democrats in flipped districts, this encounter is telling – and perhaps reassuring. It illustrates how impeachment is largely a reinforcing issue for voters. If you are against President Donald Trump, which the Hasletts most definitely are, a vote for impeachment confirms views already held. If you are for President Trump, which many voters in this historically GOP district are, such a stand underscores your intention to vote that member out of office.

Here’s another take-away from Ms. Haslett. Before thanking Mr. Cisneros for impeachment, she brought up her concerns about an immigration case and a local dam.

Most constituents want to talk about “issues that affect their daily lives,” such as taxes, health care, gun violence, and homelessness, says Mr. Cisneros in an interview. A former Navy officer, the congressman joined six other Democrats with national security backgrounds in penning an Op-Ed urging Congress to investigate allegations of presidential pressure on Ukraine’s government in exchange for personal, political gain. The Washington Post piece, published in September, played a critical role in persuading wavering Democrats to back a formal inquiry.

But at his most recent town hall in Yorba Linda – the birthplace of former Republican President Richard Nixon – impeachment did not even come up, which surprised his staff.