"Kay's broad base of support highlights that North Carolinians value her tireless work on issues from supporting a North Carolina-first economic recovery to keeping student loans affordable to standing up for servicemembers and veterans," said Hagan campaign manager Preston Elliott in a statement. "It is this grassroots excitement and strong record of results that will take Kay's campaign across the finish line with a victory in 2014."

The early money will give Hagan a big boost in what's expected to be a tough election battle in the slightly GOP-leaning state. The field against Hagan is still developing. North Carolina state House Speaker Thom Tillis (R) raised about $300,000 and has about $250,000 in the bank, according to National Journal, while Hagan's other potential opponents haven't jumped into the race yet.