Last year at this time, Republicans feared the “blue wave,” a surge of voter enthusiasm for Democrats in the midterm elections.

With the election over, and the fears of Republicans partly realized, the party’s worry has shifted to the “green wave:” $39.67 here, $39.67 there.

That’s the average donation to ActBlue, the online fund-raising hub used by more than 90 percent of Democrats. Buoyed by ActBlue, more than 100 Democratic candidates outraised their Republican counterparts in hotly contested congressional races.

That kind of uniformity and heft in small-dollar donations — typically defined as $200 or less — was missing on the Republican side, a costly shortcoming that the party is now confronting after losing 40 seats, and control of the House, to Democrats.