Rove is simply acting at the behest of his masters in the Republican Washington establishment. They will continue to attack Cain until he withdraws or is rendered a total nonentity. Cain can not be permitted to win in their view.
The GOP establishment is behind all of this. Last week’s allegations were simply to try to force Cain out or deflate his support. That failed so now they have kicked their campaign up a gear.
Last week’s allegations were the GOP establishment hinting to Cain to drop out. Since he didn’t take hint, they have kicked their campaign of character assassination into high gear.