The Republican president will now visit Iowa and Kansas for back-to-back campaign rallies on Sunday. Both events had previously been canceled for a slew of telerallies.

The surge is especially pronounced in Texas, where voters are deciding closely watched Senate, House and governor's races. More than 6.3 million Texans had voted early as of Wednesday, compared with 4.2 million at the same point four years ago, a 50% increase.