Vice President Kamala Harris met with abortion providers and staff members on Thursday in the Twin Cities, a visit that is believed to be the first stop by a president or vice president to an abortion clinic.

The appearance at a health center in St. Paul, Minn., was the latest leg in a nationwide tour by Ms. Harris, who has emerged as the most outspoken defender of abortion rights in the administration. While White House officials say they have largely reached the limits of their power to protect abortion rights, the issue has emerged as a linchpin of their re-election strategy.

Ms. Harris toured the center with an abortion provider to highlight what the administration has done to try to preserve access to the procedure as conservative states enact growing restrictions.

Minnesota has become a haven for abortion seekers since the Supreme Court overturned Roe v. Wade, ushering in restrictive laws and bans in neighboring states. The Society of Family Planning, a health research organization, found that the average number of abortions in the state increased by about 36 percent in the year after the Supreme Court decision.

Last year, Gov. Tim Walz signed legislation enshrining abortion rights into state law, an effort to ensure the procedure remains legal no matter who takes office in the state. Ms. Harris was joined on Thursday by Minnesota Democrats including Mr. Walz and Representative Betty McCollum. The tour was part of a White House initiative led by Ms. Harris to highlight abortion rights.

The mere sight of a top Democratic official walking into an abortion clinic offered the clearest illustration yet of how the politics of abortion rights have shifted for the party — and the nation.