Famous US doctor Ben Carson to run for US presidency
Retired physician Ben Carson says he plans today to announce his candidacy for president of the United States.
He is expected to make the official announcement this morning at the Detroit Music Hall Center for the Performing Arts.
The 63 year old will become the fourth candidate to formally seek the Republican nomination in the 2016 race.
The retired neurosurgeon is a political newcomer but a favorite among conservatives for his outspoken criticism of Obamacare, which is President Barack Obama's key healthcare policy.
In 1987, Carson became the first surgeon to perform a successful operation to separate twins joined at the head.