04/27/2012 05:02 pm ET

Scott Brown, Elizabeth Warren Keep Promise To Release Tax Returns In Massachusetts Senate Race

Massachusetts Senate candidates Elizabeth Warren and Scott Brown released their tax returns for the past several years on Friday, in response to a request from the Boston Globe.

Brown's returns show that Republican incumbent's family income rose significantly after he won his special election for Senate in 2010, jumping from $294,000 in 2009 to almost $840,000 a year later.

Brown released six years worth of tax returns, while Warren released four. Warren's returns show that she and her husband earned nearly $1 million over the past four years, putting her in the top 1 percent of earners, the Globe reports.

Brown has attempted to portray Warren as a member of the elite during the campaign, attacking her for an interest-free loan the Harvard law professor received from the school, as well as her decision to pay a lower tax rate on her most recent Massachusetts tax return.

Brown's earnings, however, put him in the top 2 percent.

The Massachusetts Senate race has been predicted to be the most expensive in the state's history. It has already become one of the more closely watched races in the nation.

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