(Bloomberg) -- Hosts June Grasso and Ed Baxter feature the best stories of the day from Bloomberg Radio, Bloomberg Television, and over 150 Bloomberg News bureaus around the world on Bloomberg Radio's Bloomberg Best. Some highlights include a celebration of the S&P 500's seventh year in a bull market, a look at why Bernie Sanders' Michigan primary win is such a big deal, and an exploration of whether or not Maria Sharapova's performance enhancing drugs actually enhance an athlete's performance.