HARRISBURG (AP) - Pennsylvania’s high-profile attorney general, Josh Shapiro, will formally announce his candidacy for governor on Wednesday, entering the 2022 race months after making his intentions known and effectively clearing the field of potential rivals for the Democratic nomination.

Shapiro, a familiar presence on cable TV news who has spent nearly two decades in elective office, will launch a bid to become the state’s chief executive with a speech in Pittsburgh, campaign communications director Will Simons confirmed to The Associated Press on Monday.

The 48-year-old is a self-described progressive who led a nationally prominent investigation into sexual abuse of children by clergy and further raised his political profile by pushing back against Donald Trump’s effort to overturn his presidential election loss last year.

He served as a state representative and chair of the Montgomery County commissioners board before winning election as the state’s top prosecutor in 2016 with no law enforcement background and little practical courtroom experience.

If he gets the Democratic nomination, it’s far from clear whom Shapiro would face in the fall 2022 election. The large and growing pool of potential and declared GOP candidates seeking their party’s nod includes state senators, business leaders, a former congressman and others.

Shapiro has benefited from a close relationship with Gov. Tom Wolf, a fellow Democrat who is constitutionally barred from seeking a third term. Shapiro has Wolf’s endorsement and, so far, the Democratic field to himself. He’s shown himself to be a formidable fundraiser in two successful statewide runs for office, with $2.7 million in his campaign account at the beginning of 2021.

Shapiro was reelected by 4.5 percentage points against an opponent with little name recognition or campaign cash. After securing his own victory, he helped lead the PR and legal charge - both on television and in court actions from Pennsylvania to the U.S. Supreme Court - against baseless claims by Trump and his allies that Democrats had cheated in the presidential election.

Those claims built the foundation for what Republicans now call a “forensic investigation” into the 2020 election, drawing a court challenge from Shapiro’s office over subpoenas issued to state election officials by a Republican-controlled Senate committee.

State Republican Party officials have long accused Shapiro of using the attorney general’s office to boost his political ambitions, particularly in his legal battles with Trump, and have sought to tie him to Philadelphia’s rising murder rate.

Charlie Gerow, who declared he is seeking the GOP nomination over the summer, said Shapiro should resign as attorney general.

“You can’t possibly do both jobs,” Gerow said Monday, accusing Shapiro of being “out of step with mainstream Pennsylvania.”

In a state that is closely divided between the two major parties, the governor’s race is certain to be hard fought, as will the race to fill retiring Republican U.S. Sen. Pat Toomey’s seat.

Pennsylvania’s partisan split has proven durable in recent years with a Republican-controlled Legislature, wins by both parties among the statewide elected judgeships and razor-thin margins in both the 2016 and 2020 presidential contests.