Republican George W. Bush on Monday will seek to give a fresh burst of enthusiasm to his brother Jeb Bush’s White House bid in South Carolina, marking the former president’s first appearance on the 2016 campaign trail.

George W. Bush will appear with his younger brother at a rally in North Charleston, S.C., early on Monday evening, the JebBush campaign said on Thursday.

The 69-year-old former president is highly popular in the Republican Party and particularly among South Carolina Republicans, who supported his 2000 and 2004 races for president.

South Carolina has a sizable presence of U.S. military facilities and military veterans who have supported the former commander-in-chief.

It will be the most public role George W. Bush has taken to date in his brother’s campaign. Jeb Bush brought his mother, Barbara Bush, on the campaign trail in New Hampshire last week.