(CNN) - "It didn't work then. It's not going to work now."
Texas Gov. Rick Perry spoke from experience Friday when he argued the recent Democratic attacks against Mitt Romney's private equity career will fail to carry much weight in the long run.
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A former presidential candidate, Perry was one of the first this election cycle to use Romney's former firm, Bain Capital, to knock the former Massachusetts governor. Perry made headlines when he accused Romney of "vulture capitalism" and repeatedly targeted him as a greedy corporate raider.
Newt Gingrich also jumped on the Bain train during the primary, though he soon backed down, following a backlash of Republican scorn over attacking the business world.
Now, Democrats, including the president, are using Romney's private sector experience to cast the presumptive GOP presidential nominee as unqualified for the Oval Office, arguing the job of the president is to look out for all Americans, not simply maximize profits.
Weighing in on the strategy, Perry said Friday the president's re-election campaign won't have much luck with their latest approach.
"I don't think Barack Obama wants to go there," Perry said in an interview to air on CNN's "John King, USA."
Pressed on whether Perry firmly stood behind his Bain offense earlier this year - or if it was simply a political strategy - the governor said he was merely trying to "score points."
"The point was we were looking for ways to score points, and it didn't work," Perry told CNN Chief National Correspondent John King.
Without naming names, he pointed to several Democrats who have raised concerns in recent days over Team Obama's approach, which includes aggressive attack ads featuring laid off workers from companies that went bankrupt after being purchased by Bain.
In Friday's interview, Perry also addressed the upcoming Texas Senate primary battle, fighting back against criticism that Lt. Gov. David Dewhurst, the leading candidate in the race, may not win the conservative vote in Tuesday's primary.
Dewhurst faces a crowded field of GOP challengers, with tea party favorite Ted Cruz at the top of the pack. While Dewhurst has been polling ahead of Cruz, political observers question whether he can survive the 50% threshold needed to avoid a run-off contest this summer.
National conservative groups and leaders, such as Sarah Palin and Rick Santorum, may support Cruz, but Perry argued the Texas conservative base stands with Dewhurst.
"There's, you know, people who come from out of state and make their endorsements known," Perry said. "But Texas conservatives are lining up behind David Dewhurst."
- Watch the full interview at 6 p.m. ET on CNN's "John King, USA."