Wilson and Spratt are the two S.C. congressmen expected to have the stiffest general election challenges.

Wilson had established a wide fundraising advantage over Miller after yelling “you lie” at President Obama last year during a nationally televised joint session of Congress. Wilson also became a target for national Democrats, which allowed Miller to acquire a wide, national fundraising base. With more than $3 million raised between Wilson and Miller, the race for the 2nd Congressional District will be the richest in S.C. history.

One reason Miller and Wilson are even is Wilson’s spending. Wilson drew token opposition for the June 8 primary – which he won with more than 80 percent of the vote – and he has been spending money on TV advertising and campaign staff.

Wilson’s spending since the primary has been $265,000, nearly twice as much as Miller. Wilson’s and Miller’s fundraising over the same period has been virtually even, with Wilson raising $152,416 and Miller raising $161,195.

Spratt, who has been targeted by national Republicans after three decades in the U.S. House, is expected to have the toughest path to re-election. But so far Spratt holds a commanding fundraising lead with $1.2 million available to him to Mulvaney’s $472,000.

Next week Spratt could get another fundraising boost. Vice President Joe Biden is hosting a Columbia fundraiser for Spratt.