WASHINGTON (AP) — Donald Trump has reached the final phase of his search for a running mate, narrowing his list to three leading contenders and directing his staff to prepare for a Friday announcement.

The finalists include former House Speaker Newt Gingrich, a boisterous rabble-rouser who has spent decades in Washington; Indiana Gov. Mike Pence, a steady, staunch conservative who would help to calm nervous Republicans wary of Trump’s style; and New Jersey Gov. Chris Christie, a one-time rival who has become one of Trump’s most trusted advisers.

That’s according to a person familiar with Trump’s thinking, who spoke on condition of anonymity because the person was not authorized to discuss the vetting process. Trump told The Wall Street Journal on Tuesday that Alabama Sen. Jeff Sessions is also still in the mix.