Eric Holder, the first African American to serve as Attorney General of the United States, is considering a run for president in 2020, Yahoo News reports.

“Up to now, I have been more behind-the-scenes,” Holder told Yahoo. “But that’s about to change. I have a certain status as the former attorney general. A certain familiarity as the first African-American attorney general…There’s a justified perception that I’m close to President Obama. So I want to use whatever skills I have, whatever notoriety I have, to be effective in opposing things that are, at the end of the day, just bad for the country.”

Holder served as President Barack Obama’s AG from 2009 until 2015, and has been relatively quiet since leaving the post. In the early days of the Trump administration, he’s been serving as outside counsel to the California state legislature, helping resist Trump’s mandates, especially related to California’s resistance to state law enforcement officers acting to round up undocumented immigrants.

“I thought, frankly, along with everybody else, that after the election, with Hillary Clinton as president, I could walk off the field,” he told Yahoo. “So when she didn’t win, I thought, ‘We’ll have to see how this plays out.’ But it became clear relatively soon — and certainly sooner than I expected — that I had to get back on the field and be in effective opposition.”

Other Democratic names floated as potential challengers to Trump have included Senators Amy Klobuchar, Kamala Harris, Bernie Sanders and Corey Booker, as well as former Vice President Joe Biden among others.