Where’s Liz Cheney? The Wyoming Republican’s Exile From Wyoming Republicans

The women arrived in red formal gowns, the men in suits and tuxedos. They posed in a photo booth with a cardboard cutout of former President Donald J. Trump and bid on auction items including a Glock pistol in a gift basket.

Saturday was the biggest night of the year for Republicans in southwest Wyoming — a prom-themed fund-raiser at a Holiday Inn that drew 150 of the most active conservatives in Carbon, Sweetwater and Uinta counties.

But Representative Liz Cheney, the Republican who has represented Wyoming since 2017, was nowhere to...