COLUMBIA, S.C. (AP) — It won’t be known until Election Day if a poll showing a tightening contest between Republican Sen. Lindsey Graham and Democrat Jaime Harrison portends an upset — but the gains are real enough in the Democrat’s campaign account. On the heels of a Quinnipiac University poll that has him tied with Graham among likely voters in South Carolina, Harrison’s campaign has marked two back-to-back fundraising days of $1 million apiece, bringing his total fundraising to over $30 million. It’s a staggering sum, unheard of for a Democrat competing in this conservative state, and matches what Graham...