(CNN) - Priorities USA Action announced Tuesday it had contributed more than $500,000 in the first quarter of 2014 to help Democrats gear-up for November's midterm elections.
The news came as the top Democratic group announced its first quarter fundraising numbers.
It reported raising just over $4,000 for the January-through-March period. It is not actively campaigning and still has $2.5 million cash on hand.
Priorities USA Action, the leading outside group that supported President Barack Obama's re-election, has now turned its attention to supporting Democratic candidates across the board.
It also has begun raising money to help elect Hillary Clinton to the White House if she chooses to run in 2016.
"Our focus through the end of this cycle will continue to be supporting Democratic races in the critical midterm elections. We have already donated $500,000 to Democratic House and Senate super PACs, and we will continue to urge our donors to support these efforts as well," said Peter Kauffmann, Priorities USA Action spokesman.
Touting supporter outreach, a Priorities official said that following a February memo sent from Priorities Executive Director Buffy Wicks to encourage supporters to donate to House and Senate efforts, the Plumbers union decided to donate $500,000 to the House super PAC and $500,000 to the Senate super PAC.
Many Democrats, particularly in the Senate, face tough re-election challenges in purple states where Republicans see opportunities to pick up seats in hopes of grabbing the majority in the upper chamber, where Democrats currently hold a 55-45 majority. Democrats are defending 21 of the 36 seats up in November.
In the House, Democrats need to pick up 17 seats to regain the majority. But with a shrinking number of competitive districts, most political handicappers say it's unlikely they'll be able to do it.
CNN Political Editor Paul Steinhauser and CNN's Dana Davidsen contributed to this report.