Louisiana Gov. Governor Bobby Jindal addresses the Nebraska Republican convention in Grand Island, Neb., Saturday, July 14, 2012 (AP Photo/Nati Harnik) Louisiana Gov. Governor Bobby Jindal  in July 2012. (Nati Harnik/AP)

A new poll in Louisiana shows President Obama is now more popular than Gov. Bobby Jindal (R), despite the state's clear Republican lean.

The Southern Media and Opinion Research poll, which is funded by GOP donor Lane Grigsby, shows the potential 2016 presidential candidate's approval rating has fallen to 38 percent — down from 51 percent in September.

Obama, who lost the state by more than 17 points in November, has a 43 percent approval rating.

As The Fix noted in February, Jindal has struggled thanks in part to his decision to turn down a popular expansion of Medicaid. More recently, his education reforms were struck down by a Baton Rouge judge.

The poll also noted that his state tax reforms poll poorly, with 63 percent opposing them.

Jindal's home-state struggles are threatening to derail his 2016 presidential ambitions. While it's not unusual for governors to leave office with less-than-stellar numbers, the fact that Jindal comes from a very red state would make it harder to explain away.

In other findings in the poll, Sen. Mary Landrieu (D-La.), who is up for reelection in 2014, has a strong 56 percent approval rating. But just 37 percent are committed to voting for her again, while 34 percent say they will definitely vote for someone else.

Rep. Bill Cassidy (R-La.) is set to join the race against Landrieu and is the early GOP favorite.