Former Rep. Joe Sestak (D-Pa.) announced Sunday that he would drop out of the Democratic primary race after failing to gain traction in national polling despite months of campaigning.

Sestak said in a press release that he was thankful for what he called an "endeavor filled with immeasurable wisdom, passions, humor and insights to, and from, the people of America."

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"Thank you for this priceless opportunity as I end our campaign together. Without the privilege of national press, it is unfair to ask others to husband their resolve and to sacrifice resources any longer," Sestak wrote. "I deeply appreciate the support so many of you offered -- whether by volunteering, offering financial contributions or coming to our campaign events. I will miss the opportunities I had in experiencing America in such a wonderful way!"

"With my deepest appreciation, please accept my final note of service to you," he added, seemingly implying that he would not seek public office again.

Sestak served as congressman for Pennsylvania's 7th Congressional District and twice ran for Senate, winning his party's nomination once in 2010 before losing a general election to now-Sen. Pat Toomey Patrick (Pat) Joseph ToomeyAppeals court rules NSA's bulk phone data collection illegal Dunford withdraws from consideration to chair coronavirus oversight panel GOP senators push for quick, partial reopening of economy MORE (R-Pa.). In 2016, he lost a primary election to Katie McGinty, who also went on to be defeated by Toomey in the general election.