NBC News confirms that Democrat Alex Sink won't wage a rematch against Rep. David Jolly, R-Fla., in November, according to a Democrat with knowledge of Sink's decision.
Last month, Jolly narrowly defeated Sink in a closely watched special election to fill the congressional seat vacated by the late Rep. Bill Young, R-Fla.
While the district is competitive -- Obama won it in 2012 -- Sink's decision means that Jolly has an easier path to holding on to the congressional seat in the general election.
Top Democrats said after Sink's special election defeat that they hoped she would run against against Jolly in November.
"We feel good about our prospects here," DCCC chairman Steve Israel said on MSNBC's The Daily Rundown last month. "And I hope that she does run again, because she did an extraordinary job."