Special Delivery: Cain Sends "9-9-9′ Newt's Way The "9-9-9″ plan isn't dead. In fact, it may just get a second life with Newt Gingrich. Herman Cain, the former pizza magnate and presidential candidate behind the catchphrase/tax plan of yestermonth, told ABC News in an interview today that Gingrich is seriously considering adopting the 9-9-9 platform as his own. "9-9-9 will be a major consideration," Cain said. That is why he asked me to co-chair his jobs, work, and tax advisory council. The proposal calls for personal income tax, corporate income tax and a national sales tax to each be set at 9 percent. Gingrich confirmed to ABC News in an interview that he promised to consider the plan, though he said he's unlikely to take it on fully. The candidate pointed out that he already has a fairly comprehensive tax plan of his own. "It's certainly one of things that will be on the table," Gingrich said. I've already got a pretty comprehensive tax plan, so I'm also going to ask Herman to look at my tax plan. Cain has endorsed Gingrich, and the former candidate said the ex-speaker's pledge to "take it at serious consideration" was a factor in his decision. Gingrich didn't promise to adopt it, Cain said. In an interview with ABC News" "Nightline," Cain said Gingrich has called him "several times" in the past few weeks, and he called Gingrich "the only candidate with a commitment for fundamental reform of our tax system."