Newark Mayor Cory Booker speaks last year. (AP Photo/Charles Sykes)

Maryland Gov. Martin O’Malley (D) plans to head to New Jersey on Thursday to campaign for Newark Mayor Cory Booker (D), the favorite in the Garden State’s U.S. Senate race, O’Malley aides confirmed Tuesday.

O’Malley, who is weighing a 2016 presidential bid, is scheduled to appear at campaign stops on Booker’s behalf in Trenton and Paterson and appear with Booker in Newark.

O’Malley endorsed Booker in June, praising him for having embraced CitiStat, a program that O’Malley pioneered while mayor of Baltimore. The program seeks to hold government agencies accountable through a bevy of statistical measures of performance.

The trips comes at a time when O’Malley is seeking to build his exposure nationally by helping Democratic candidates around the country.

Last week, O’Malley reported raising nearly $500,000 for his political action committee since the start of the year, a stretch during which he was more focused on fundraising for other candidates, aides said.