The third independent poll in two days shows that the Louisiana Senate race is boiling down to three candidates: State Treasurer John N. Kennedy, U.S. Rep. Charles Boustany, on the Republican side, and Public Service Commissioner Foster Campbell for the Democratic Party.

Kennedy, of Madisonville, is leading with 22 percent of voters in the University of New Orleans Survey Research Center released Thursday afternoon. Boustany, of Lafayette, and Campbell, of Bossier Parish, came in at 15 percentage points.

Two separate surveys commissioned by different groups of businessmen and professionals and released Wednesday came up with similar numbers.

Early voting continues through Tuesday for the Nov. 8 election. The top two vote-getters in will advance to the runoff in an election to replace U.S. Sen. David Vitter, who is stepping down at the end of his term. 

Eleven percent favors Republican U.S. Rep. John Fleming, of Minden, and 10 percent support Democratic New Orleans attorney Caroline Fayard in Thursday’s UNO poll.

All other candidates received single digit percentages, including David Duke, who had 2 percent of the vote in the UNO poll.

The only poll that showed Duke with support higher than 3 percent was the one Raycom Media used to decide who to invite to its televised debate on Wednesday, Nov. 2. In the Raycom poll, Duke scored 5.1 percent – a tenth of a point more than needed to secure a place in the debate.

In the presidential race, 49 percent of likely voters support Republican Donald Trump while 35 percent favor Hillary Clinton, the Democratic candidate, according to the UNO poll.

UNO individually interviewed 603 voters by phone between Oct. 15 and Oct. 21. The poll’s margin of error is plus or minus 4 percentage points, meaning the numbers reported could more or less by that amount.

Fifty-six percent of likely voters report they will vote Republican in the Senate election, according to the poll.

White likely voters are solidly behind the Republican candidates in the Senate election, the UNO survey states. Three of four report they will vote for a Republican while only 12 percent say they will vote for one of the Democrats.

Kennedy leads with these voters. Thirty percent of white likely voters support him, while 20 percent favor Boustany and 14 percent are for Fleming.

African-Americans are more supportive of the Democratic candidates. Fifty-nine percent report they will vote for either Foster Campbell or Caroline Fayard, according to the poll.

Campbell has a decided advantage over Fayard among African-American voters as nearly twice as many of them say they will vote for Campbell then will vote for Fayard, the UNO survey reported.

The poll also found that 56 percent of those questioned approve of how Gov. John Bel Edwards is doing his job.

Follow Mark Ballard on Twitter, @MarkBallardCnb.