Janet Mills in sworn in as the 75th governor of Maine during her inauguration ceremony at the Augusta Civic Center on Wednesday.

Janet Mills in sworn in as the 75th governor of Maine on Wednesday.

Gov. Janet Mills blows kisses to the cheering crowd after she is sworn in as the 75th governor of Maine during her inauguration ceremony at the Augusta Civic Center on Wednesday.

Gov. Janet Mills laughs as Secretary of State Matthew Dunlap performs the proclamation of her governorship with dramatic flair after she is sworn in on Wednesday.

Secretary of State Matthew Dunlap adds dramatic flair to his proclamation of Janet Mills' governorship after she is sworn in.

Gov. Janet Mills delivers a wide-ranging speech after being sworn in on Wednesday.

Gov. Janet Mills acknowledges applause after taking the oath of office Wednesday. Mills, a Democrat, is the state's first woman to serve as governor.

Gov. Janet Mills addresses the crowd after being sworn in as the 75th governor of Maine at the Augusta Civic Center on Wednesday.

Gov. Janet Mills hugs Natalia Mbadu, 10, and Shy Paca, 11, after they sang a rendition of the song, "Girl on Fire" during her inauguration ceremony at the Augusta Civic Center on Wednesday.

Gov. Janet Mills dances during a performance of the song "Girl on Fire" by Natalia Mbadu, 10, and Shy Paca, 11, at Mills' inauguration Wednesday.

Pat Kosalka, left, and Mary Anne Courbron celebrate as Janet Mills arrives at her inauguration ceremony prior to becoming Maine's 75th governor on Wednesday.

Gov.-elect Janet Mills reacts as she walks into a room filled with friends and family in the Blaine House before heading over to the Augusta Civic Center for her inauguration Wednesday, January 2, 2019.

Gov.-elect Janet Mills is greeted by friends and family in the Blaine House before heading over to the Augusta Civic Center for her inauguration Wednesday.

Gov.-elect Janet Mills is greeted by friends and family at the Blaine House before heading over to the Augusta Civic Center for her inauguration Wednesday, January 2, 2019.

Maine state senators walk into the Augusta Civic Center for the inauguration of Janet Mills on Wednesday.

A little girl waves at senators walking into the Augusta Civic Center before Janet Mills is sworn in as governor.

A crowd gathered at the Augusta Civic Center for the inauguration of Janet Mills on Wednesday.

Gov.-elect Janet Mills walks into the Augusta Civic Center before her inauguration on Wednesday.

Gov.-elect Janet Mills walks into the Augusta Civic Center before her inauguration on Wednesday.

Janet Mills shares a laugh before she is sworn in as the 75th governor of Maine.

Gov. Janet Mills shakes hands with attendees after she is sworn in as the 75th governor of Maine.