If you’re not registered to vote, you still have time to take part in Louisiana’s presidential primary April 4. The last day to register in person in time for the Democratic and Republican primaries is Wednesday. If you use the geauxvote app, you have until March 14. Republican President Donald Trump hasn’t attracted serious opposition in the GOP primaries so far. The Democratic field is tightening after former Vice President Joe Biden’s win Saturday in South Carolina. The field is growing smaller, too, after South Bend, Indiana, Mayor Pete Buttigieg and billionaire Tom Steyer bowed out following South Carolina. More winnowing is likely ...