Dozens of zombie congressional campaign committees together are sitting on nearly $200 million, NBCLX reported.
More than half of the Romney presidential committee's remaining $92,000 was transferred to his US Senate committee, which reported about $325,000 cash on hand as of June 30.
Asked why it took so long for Romney's campaign to shut down, a former Romney campaign official said it's a "several years' long process to shut down a presidential campaign committee."
Obama terminated his 2012 presidential campaign committee more than two years ago, on July 15, 2018.
Santorum's 2012 presidential committee owes about $450,000, while his 2016 presidential committee remains about $520,000 in arrears.