First Lady Jill Biden will be in Arizona this week for two days of campaigning in Yuma and Phoenix.

Early voting has begun in the battleground state of Arizona, and Biden is strengthening his lead over Vice President Kamala Harris. Mail-in voting begins across the state on Wednesday, giving Arizonans the ability to start voting well in advance of Election Day on November 5th.

According to the Harris campaign, Biden will campaign in Yuma on Friday and Phoenix on Saturday.

The first lady is scheduled to arrive in Arizona the day after Harris, who is scheduled to hold a rally in Phoenix on Thursday night.

Biden most recently traveled to Arizona to attend a “Biden-Harris” event in June, before her husband, President Joe Biden, ended his re-election campaign.

It’s been a busy week of campaigning in the battleground state of Arizona. Arizona is one of the few states on the Electoral College map where either Harris or former President Donald Trump could win on election night.

Second Gentleman Doug Emhoff is scheduled to campaign for Harris in Arizona on Tuesday, while Minnesota Governor Tim Walz and President Trump’s running mate J.D. Vance will be in the state on Wednesday. I’m planning on entering. President Trump is scheduled to conclude the week with a rally in Prescott Valley on Sunday.

This article originally appeared in the Arizona Republic. Jill Biden campaigns in Yuma and Phoenix this week