Democratic presidential candidate Michael Bloomberg has been aggressively courting black voters while his rivals have been battling it out in majority-white Iowa and New Hampshire. The billionaire presidential candidate’s effort is backed by millions of dollars in ads. It has taken him across Southern states that vote on Super Tuesday and where African American voters can decide a Democratic primary. The outreach aims squarely at former Vice President Joe Biden, who’s banking on black voters to resuscitate his bid after poor showings in Iowa and New Hampshire. It’s also forcing Bloomberg to respond to criticism of his criminal justice policies when he was mayor of New York.