If one thing is clear from a poll released Friday, it’s that the GOP primary for the state’s U.S. Senate seat is a toss-up.

A poll of 426 likely Republican voters sponsored by RRH Elections, a Republican-leaning blog, found former Alabama Chief Justice Roy Moore holding a narrow lead over U.S. Sen. Luther Strange, 31 percent to 29 percent. The gap was within the poll’s margin of error of 5 percent.

The primary will take place Aug. 15.

U.S. Rep. Mo Brooks, R-Huntsville, stood at 18 percent, which the pollsters attributed to an onslaught of ads from the Strange campaign and a Mitch McConnell-aligned political action committee questioning his support of President Donald Trump. 62 percent of those surveyed said they strongly supported the president; only five percent said they strongly disapprove of him.

“His numbers have been hurt among the president’s most fervent supporters and boosted among the small minority that disapprove of Trump,” RRH Elections wrote.

Sen. Trip Pittman, R-Montrose, came in at 8 percent support and Dr. Randy Brinson, the former head of the Christian Coalition of Alabama, drew 2 percent of the electorate. 11 percent were undecided.

A runoff election – which would take place Sept. 26, if needed – appears to be even more scrambled. In a Moore/Strange runoff, the former chief justice holds a 34 to 32 percent edge over the incumbent, but 35 percent of those polled said they were undecided. Moore did better in a runoff with Brooks; 43 percent of those polled said they would vote for the former chief justice, while 20 percent said they would vote for Brooks. 37 percent said they were undecided in that scenario.

Despite a raft of ads from Strange trying to tie his fate with the President’s, the poll found Moore leading Strange 36 percent to 33 percent among those who strongly approve of the President’s performance, with a larger lead (33 percent to 26 percent) among those who “somewhat” approve of the President’s performance.

The poll also broadly suggested Moore support concentrated in the Wiregrass and eastern Alabama, with Strange support strongest in the suburbs around Birmingham. Brooks held a lead in north Alabama while Pittman, from coastal Alabama, had a decent base of support in the 1st Congressional District.

The primary will take place in an off-year in the middle of August, and could likely be low turnout, making motivation of voters a key factor.

The poll was conducted between July 31 and Aug. 3. RRH Elections said 369 responses came from phone calls, while 57 came from online surveys.