The final push from the Romney campaign and its allies is evident. For the first time this fall, they aired more ads than did the Obama campaign and its allies—about 7,500 more.

Last week, for the first time this fall, Republican advertising in the presidential election essentially matched Democratic advertising. In the period from Oct. 22-27, the Democrats aired about 38,700 ads while Romney and his allies aired about 38,200 ads.

Obama has consistently out-advertised Romney, but his advantage has been mitigated or even eliminated by the efforts of independent groups on the Republican side and, to a lesser extent, the Republican National Committee.