CNNMoney: In the latest sign of MSNBC’s reinvention, polarizing talk show host Al Sharpton is being moved from a prime five-day-a-week show to once-a-week. Sharpton will give up his 6 p.m. hour on weeknights on Sept. 4, and he’ll take over the 8 a.m. Sunday hour a month later. The move comes as MSNBC steers away from provocative progressive talk and emphasizes more straightforward news programming.