Former President Barack Obama’s entry into the presidential race is an effort to boost Democratic Party turnout against President Trump and secure votes that fell by Hillary Clinton’s wayside in 2016, according to Democratic strategists.

“You’ve got both camps firmly entrenched with their support base, and the question is now turnout, turnout, turnout, turnout,” said Terry Madonna, director of the Franklin & Marshall College Poll, pointing to Obama’s address in Philadelphia on Wednesday. “That’s what Obama was doing there yesterday.”