Associated Press file photo by Evan Vucci -- U.S. Sen. Mary Landrieu, D-La.

U.S. Sen. Mary Landrieu leads the three Republicans challenging her reelection and U.S. Sen. David Vitter is viewed more favorably than Gov. Bobby Jindal, according to a statewide poll paid for by Lane Grigsby, a Baton Rouge contractor who frequently contributes to conservative candidates.

Though Landrieu leads with definite and probable voters across the state, she only has 39.3 percent of the 600 voters interviewed between March 24 and March 26. The poll by Magellan Strategies of Baton Rouge, which was released Thursday, has a margin for error of plus or minus 4.1 percent.

U.S. Rep. Bill Cassidy, of Baton Rouge and the leading GOP challenger was the choice of 26.3 percent of the respondents and the second choice for 15.7 percent.

The other two Republicans in the race – state Rep. Paul Hollis, of Covington, and Rob Manness, retired U.S. Air Force officer from Bossier City – both scored in the single digits. Hollis, however, was the second choice for 17 percent of respondents.

But 52.2 percent of those questioned had an “unfavorable” impression of Landrieu. Vitter had 55.8 percent “favorable” ratings in the poll. Jindal had 45 percent total “favorables” and 46.7 percent “unfavorables.”