Harris works to earn Pennsylvania's Republican votes alongside Liz Cheney
Harris is doing a series of moderated conversations with former Wyoming Republican Rep. Liz Cheney in suburban cities in the battleground states of Pennsylvania, Michigan and Wisconsin on Monday.
While in Pennsylvania, Harris and Cheney worked to pick off Republicans disaffected with their party's nominee who may vote for the vice president and focus on the dangers Trump poses to the country and to democracy.
"There are months in the history of our country which challenge us, each of us, to really decide when we stand for those things that we talk about, including, in particular, country over party," Harris said.
Cheney, a staunch Trump critic who endorsed Harris in September despite their party and policy differences, said "every single thing in my experience and in my background has played a part" in her supporting Harris.
"In this race, we have the opportunity to vote for and support somebody you can count on. We're not always going to agree, but I know Vice President Harris will always do what she believes is right for this country. She has a sincere heart, and that's why I'm honored to be in this place."
Read more about Harris and Cheney's events here.
-ABC News' Will McDuffie, Gabriella Abdul-Hakim and Fritz Farrow