Despite all the tough headlines, he could prevail. Here are two theories about how the runoff could unfold.The steady stream of tough headlines for Herschel Walker has always obscured one stubborn fact about the Senate race in Georgia: He could still win.With the runoff election just days away, the conventional wisdom holds that Senator Raphael Warnock is waltzing toward re-election against an inexperienced Republican opponent who has a thin grasp on policy issues, avoids reporters, faces serious allegations about his personal conduct and has been known to ramble on the stump. But if things were that simple, Warnock would have won handily in November.And if there’s one thing American politics keeps teaching us, it’s to be humble about predicting what voters will do. With that in mind, here are two basic ways to look at the Georgia runoff on Tuesday:The case for WarnockUnder this theory, the runoff is Warnock’s to lose.Many Republicans will stay home, the thinking goes, because they no longer believe that their vote matters much. It’s hard to make the case that 51 Democrats in the Senate, as opposed to 50, would represent some huge threat to conservative priorities and values. Denying Democrats a majority vote on Senate committees is not the kind of argument that fires up the Republican base.Runoff elections are driven by who can persuade more of their supporters to vote yet another time. And Warnock has a battle-tested turnout operation that has now performed well over three elections.The Walker campaign, by contrast, is relying on Gov. Brian Kemp — who is no longer on the ballot — to drag a weak candidate across the finish line. Senate Republicans have basically rented Kemp’s field program for the runoff, but it’s not at all clear that an operation built to turn out voters for Kemp can change gears so easily. Walker drew about 200,000 fewer votes than Kemp did, suggesting that there’s a large chunk of Republican voters who find the Senate hopeful unworthy. Forced to stand on his own two feet, Walker might crumble.Democrats are also outspending Republicans heavily down the stretch. Since Nov. 9, they’ve spent more than double what Republicans have spent on the runoff on digital and television advertising — nearly $53 million versus a little over $24 million, according to AdImpact, a media tracking firm. The two parties were much closer to parity in the three months before Election Day, though Democrats had a slight edge in spending.The case for WalkerThe second theory rests on the fact that Georgia is still fundamentally a right-leaning state, as this year’s blowout race for governor showed. Perhaps the state’s historical tendencies will prove decisive in the runoff, whatever Walker’s deficiencies as a candidate.Warnock finished ahead of Walker in the general election by fewer than 40,000 votes. The Libertarian candidate, Chase Oliver, received more than 81,000 votes — and he is not on the ballot this time. Oliver earned about 50,000 votes more than the Libertarian candidate did in the race for governor, suggesting that he was a sponge for conservatives who could not stomach Walker. If only 46 percent of Oliver’s supporters vote for the Republican this time, Warnock’s margin on Nov. 8 will be completely erased.It’s possible, too, that voters who chose Kemp but not Walker in November will change their minds — if they show up, that is. Walker drew a lower share of the vote than Kemp did, not just in metro Atlanta but also in the most conservative areas of the state. According to The Atlanta Journal-Constitution, Walker ran behind Kemp by at least six percentage points in eight counties — most of them Republican strongholds, with the exception of Cobb County.Walker’s indictment of Warnock was always a simple one: He’s another vote for President Biden’s agenda. And, Biden, with an approval rating in the 30s or low 40s, is about as popular in Georgia as the Florida Gators. So Warnock was careful, during his lone debate with Walker, not to associate himself too closely with Biden.What to Know About Georgia’s Senate RunoffCard 1 of 6Another runoff in Georgia. More