If there’s one thing we know about today’s Georgia Republican primary for U.S. Senate, it’s that we really don’t know who will win. Or, more precisely, we don’t know which candidates will come in first and second to proceed to the inevitable runoff election in July. With five major candidates in the running, it’s unlikely the winner will get the necessary 50 percent support to avoid a runoff. So even after today, we still won’t know who will be the Republican nominee in November.

First, who’s likely not to make the runoff? Phil Gingrey hasn’t led in a single poll all year, despite some early perceptions that the 71-year-old metro Atlanta congressman was formidable. Most polls in the last few months have found Gingrey at the bottom of the pile. Gingrey’s House colleague Paul Broun, 68, has similarly fizzled out, appearing strong when he entered the race last year but failing to earn above 15 percent in any poll.