Louisiana Gov. Bobby Jindal, a one-time rising star in the Republican Party now struggling to become one again, will announce Wednesday afternoon whether he intends to run for president in 2016. Jindal's appearance -- to be held in the New Orleans suburb of Kenner at 5 p.m. Eastern time -- does not seem much of a mystery. The 44-year-old two-term governor has given every indication that he will run. He has already traveled multiple times to early-primary states -- spending 45 percent of his days outside of Louisiana last year. And this year, some of Jindal's top state-government aides have...