From a statement tonight: 

Since the outcome of the Republican primary election for the United States Senate, many Delawareans have encouraged me to pursue the Senate seat as a write-in candidate for the general election in November.  I understand why people care so deeply about this election; I listened closely to many viewpoints and carefully considered the option of staying in the race.

 Jane and I have been humbled by the strong encouragement from so many friends, colleagues and supporters to undertake this effort. While I would have been honored to represent Delaware in the U.S. Senate, I do not believe that seeking office in this manner is in the best interest of all Delawareans.  Therefore, it’s time for Jane and me to begin thinking about the next chapter of our lives. 

Much of my life has been dedicated to representing Delawareans and it has been my privilege and great honor to serve you and represent our state in the legislature, as Lt. Governor, Governor and in the United States House of Representatives.  

 Delaware is a close community of people who find practical solutions to the complex challenges we face.  That characteristic is something that makes our State a very special place to live.  I look forward to continuing to serve our State as your Congressman in the remaining months of my term in a principled manner; Delawareans deserve no less.