After weeks of intense pressure, and more than a year after announcing her presidential candidacy, Sen. Hillary Clinton has offered little explanation for why she has delayed releasing the tax returns made public by most other Democratic presidential candidates in recent years.
"What is the holdup?" said Sheila Krumholz of the Center for Responsive Politics, a nonprofit group that tracks the role of money in politics. "She hasn't exactly made it clear as to what process is making it so cumbersome to just release them."
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