The annual day of recognition triggered US right-wingers for falling on Easter.
Both Republicans and Democrats are currently voting in the presidential primaries for Georgia, Mississippi, and Washington.
Republican National Committee members voted last week to appoint Michael Whatley and Lara Trump as chair and co-chair.
The celebrations come despite low approval ratings for both candidates.
A video shows Alexandria Ocasio-Cortez unleashing on the demonstrators as she left a movie theatre in New York City.
Swift has called for voter participation among her supporters in the past.
Haley is the only remaining challenger to Donald Trump in the Republican primary race.
"He betrayed the Queen. That's unforgivable."
Special Counsel Robert Hur said he opted against charges because Biden would likely be difficult to convict.