Democratic presidential candidate Michael Bloomberg on Sunday pledged to narrow the wealth gap between black and white Americans by boosting black ownership of homes and businesses and investing in poor neighborhoods.

Bloomberg, a late entry to the Democratic nomination contest, is rising in public opinion polls as he uses his vast personal fortune to spend heavily on advertising nationwide.

But the billionaire former mayor of New York trails front-runners Bernie Sanders, Joe Biden and Elizabeth Warren nationally and among African-Americans, who make up about a quarter of Democratic voters in the contest to take on Republican President Donald Trump in the November election.