Alexandra Jaffe, CNN:
The announcement will take place at the Detroit Music Hall Center for the Performing Arts, and will be ticketed, but the rest of the details — the exact time, and how many tickets Carson will distribute to supporters — have yet to be hammered out, a spokeswoman said.
Indeed, the substance of the announcement itself, spokeswoman Deana Bass said, is still up in the air.
“He will make an announcement. But he’s still very much in the exploratory phase, so he hasn’t made a decision yet,” she said.
If Carson does kick off a presidential bid, as expected, his announcement would add a political newcomer and African-American candidate to the rapidly growing Republican field.