Harris will go after Trump in her speech in Houston, Texas, on Friday night that will focus on reproductive rights.
"The Attorney General of Texas is suing the United States Government so that Texas prosecutors can get their hands on the private medical records of women who leave the state to get care," Harris will say, according to released excerpts of her speech.
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Both presidential nominees are visiting the Lone Star State on Friday. Since Texas is not considered a battleground state, campaign events in Texas this close to the election are rare.
"So, see what is happening: Donald Trump won't let anyone see his medical records. But these guys want to get their hands on yours? Simply put: They are out of their minds," she will say.
The vice president will reiterate her campaign pledge to push Congress to pass a bill restoring Roe v. Wade if elected.
"We are fighting for an America where, no matter who you are, or where you live, you can make that decision based on what is right for you and your family," Harris will say.
ABC News' Gabriella Abdul-Hakim, Fritz Farrow and Will McDuffie