Ms. Malhotra, who has been following Judge Barrett’s career for several years, said she saw in Judge Barrett the attributes of women she admired in different spheres of her own life, but had not seen displayed on such a big stage before. “She represented the women I go church with, while also representing the professors I had in graduate school,” she said. “She seemed to be the whole package.”

Although Mr. Trump is notably more popular with men than women, conservative women are a critical voting bloc for the president as he faces a challenging election in November. The president’s advisers hope the selection of Judge Barrett will energize his base; while it is unclear yet how much difference the nomination will make to voters who are already inclined to vote for him, it has added a jolt of energy in some circles.

Several women reported participating in enthusiastic group