Former New York City Mayor Rudy Giuliani might be in line to take over as secretary of state in President-elect Trump’s first term, according to reports.

Giuliani, who ran for president in 2008 after leading New York City through the attacks on the World Trade Center in 2001, was a staunch Trump ally throughout the presidential election season. He’s now “the favorite” to take over the State Department, one of the plum positions of any presidential administration, according to the Associated Press.