Former President Barack Obama is the latest high-profile Democrat to appear in an ad to oppose the Republican-led recall election to oust Gov. Gavin Newson.
The State Department cited concerns of a "possible anomalous health incident in Hanoi" that delayed the vice president's trip.
The governor is in danger of losing to a Republican, creating serious implications for the Democratic Party nationwide.
Vice President Kamala Harris will attempt to reassure allies of American resolve following the chaotic end of a two-decade war.
Voters could oust Gov. Gavin Newsom next month and end up with a little-known Republican running the state.
The Republican-backed laws are designed to "make it harder for you to vote," the vice president told an audience at Howard University.
Ella Emhoff, who is signed to IMG models, walked for a front row including Kanye West, James Harden and more.
Republicans have relentlessly dogged the vice president for not visiting the border sooner, but Harris said there was strategy to her timeline.
The vice president has faced relentless criticism from Republicans for not visiting the border in recent months.
In a blow to Democrats, Republicans have successfully stopped a bill that would have protected voting rights.