Obama's campaign manager had some sharp words for Clinton Friday (AP Photo)
WASHINGTON (CNN) - Barack Obama's campaign stepped up its effort Friday to target Hillary Clinton for delaying the release of her income tax returns, saying the New York senator has a "pattern of secrecy" and has yet to be fully vetted by the American people.
"Senator Clinton is one of the most secretive politicians in America today," Obama Campaign Manager David Plouffe said in a conference call with reporters. "She has consistently refused to release her tax returns. They have said they are going to release them around [April] 15, but there is no reason why the prior six years of tax returns couldn't be released right now."
Obama's campaign has long criticized Clinton for not releasing her previous tax returns, though it stepped up its attacks earlier this week. In a conference call the morning after Obama lost three out of the four March 4 primary contests, Obama strategist David Axelrod said Clinton is the least-vetted candidate in the presidential field because of her refusal to disclose the documents.
Clinton's Communications Director Howard Wolfson released a statement shortly after the call repeating recent assurances that the New York senator will release last year's tax returns in April. He also said over 20 years of Bill and Hillary Clinton’s tax returns are already public.
Clinton did release a Senate disclosure form last May that revealed the couple’s joint income for the previous year was upwards of $12 million. But a tax return would present a more comprehensive account of the Clintons’ income, and include revenue sources that aren't required on Senate disclosure forms.
"Considering the huge amounts of money they have made in recent years, they've contributed their money to the campaign, some of those relationships financially have been with individuals who have come under quite a bit of scrutiny for possible ethics transgressions, its essential to know where the American people are getting there money from," Plouffe said Thursday.
"If Sen. Clinton is not being open and honest about her tax returns or her experience on the campaign trial, you have to wonder if she'll be open and honest with the American people as president," he added.
- CNN Ticker Producer Alexander Mooney