(CNN) - Rep. Mike Castle who lost the Republican Senate nomination in Delaware has decided not to launch a write-in bid for the seat.
"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," Castle said in a statement released Wednesday night.
In the statement Castle declined to endorse either candidate now running.
(CNN) - Rep. Mike Castle just told CNN he will make a decision soon- as early as Wednesday- about whether to launch a write-in candidacy.
Castle has been contemplating the move since losing the GOP Senate primary in Delaware a few weeks ago.
But he told me he's also been leaning against it.
We spoke while walking outside of the House chamber:
4:50 p.m. - Few Republican lawmakers were as stung by Rep. Mike Castle's surprising loss to his conservative GOP opponent as Maine Republican Sen. Olympia Snowe.
In a hallway just off the Senate floor Thursday afternoon, she sounded off about her place as a moderate in the GOP, and voter anger she says she understands.
Visibly sad, Snowe called Castle "an outstanding public servant who was committed to the common good of his state and country."
The longer Snowe talked about the state of the GOP and the Tea Party movement, the more riled up she got.
"Understand, there are a lot of issues that, for example, in the Tea Party that they raise that are legitimate issues. Did we abandon our basic principles of fiscal responsibility? Absolutely. I was arguing those points during the Bush administration," Snowe said emphatically, "I made those very arguments."
(CNN) - The campaign of former Delaware Republican Senate candidate Mike Castle says there is "zero" chance he endorses his formal rival Christine O'Donnell.
According to Kate Dickens, spokeswoman for the Castle for Senate Campaign there is also, "zero chance that he endorses Coons."
After winning the GOP primary Tuesday night, Christine O'Donnell will face Democrat Chris Coons in the November general election.
Dickens told CNN that O'Donnell will not receive Castle's endorsement because of "the personal attacks on him and his family."
Washington (CNN) - The two top non-partisan political handicappers are changing their rating of Delaware Senate battle.
Just a few hours after Christine O'Donnell's upset victory over nine-term Rep. Mike Castle, the Rothenberg Political Report moved the race from "Lean Republican" to "Lean Democrat." Wednesday morning, the Cook Political Report changed their rating, from "Likely Republican" to "Likely Democrat."
"Castle had broad appeal, including to independents and even Democratic voters, while O'Donnell's appeal is limited to tea party conservatives. Lacking an impressive resume and unlikely to garner significant national Republican support, O'Donnell clearly looks like an underdog against New Castle County Executive Chris Coons (D), who is suddenly transformed to the favorite in the general election," said the Rothenberg Report. "While tea party activists are jumping for joy at the primary results, it's Democrats who will have the last laugh in Delaware."
Dover, Delaware (CNN) - Delaware election officials are reporting a better turnout than in some previous off-year primaries. There are just over 180,000 registered Republican voters in the entire state, and the primary is only open to them.
Of the three counties in the state, Sussex, which includes the southern part, says anecdotally it is seeing much higher turnout than normal in an off-year primary. This is the area where Christine O'Donnell has concentrated a lot of her efforts in her bid against Rep. Mike Castle.
"Excellent turnout" is how Kenneth McDowell, the county's elections director, put it to CNN. In many districts there are contested local contests as well helping to boost the number showing up at the polls, and in those areas McDowell expects turnout by the end of the day to be 40-45 percent.
(CNN) - The Delaware Republican party has launched a new robocall the same day voters head to the polls - attacking one of their own.
It features a woman identifying herself as former campaign manager for Republican Senate candidate Christine O'Donnell's and saying, "O'Donnell is no conservative" rather she "just wanted to make a buck."
In the call, a woman introduces herself as Kristin Murray, saying she managed O'Donnell's 2008 Senate bid and alleges: "I found out she was living on campaign donations – using them for rent and personal expenses, while leaving her workers unpaid and piling up thousands in debt. She wasn't concerned about conservative causes. O'Donnell just wanted to make a buck."
Editor's note: Look for regular Trail Running field updates from CNN's anchors, correspondents and producers spread out across the country covering politics on the campaign trail. As always, the CNN Political Ticker is your source for up-to-the-minute political news– now even more so.
10:40 a.m. – Delaware Republican Senate candidate Mike Castle thinks a vote today for his opponent Christine O'Donnell is a vote for a Democrat in November – and the outcome of this Delaware primary could keep the Senate in Democratic hands. He took polite swipes at former Alaska Governor Sarah Palin and the Tea Party Express. He says he believes this campaign is a test case for the internal squabble about the future of the Republican party.
(CNN) - Nine-term Republican Congressman Mike Castle finds himself in a tight primary race with TV commentator and Tea Party favorite Christine O'Donnell in Delaware's Republican U.S. Senate primary on Tuesday.
In the closing days of the primary campaign, O'Donnell has gotten a boost with an endorsement by former Alaska Gov. Sarah Palin and more than $150,000 in late spending from the Tea Party Express. All this has the Republican establishment worried that O'Donnell could take down the Republican they believe is best positioned to win in November.
O'Donnell has positioned herself as a conservative gate-crasher.
"We're breaking up the backroom deals," she told CNN. "We're restoring the political process back to the hands of the people." She refers to Castle as the "anointed one."
Washington (CNN) – The Chairman of the Delaware Republican Party received a death threat recently over his support for Republican Congressman Mike Castle in Tuesday's Senate primary, according to an official in the Delaware GOP office.
The official tells CNN, state GOP Chair Tom Ross received the threat via e-mail last week, and Ross and his family have since had to move out of their house. Ross is backing Castle against Tea Party-backed candidate Christine O'Donnell in Tuesday's Republican primary, which has become an increasingly contentious race with incendiary rhetoric from both sides.
The state GOP official directed CNN to a left-leaning Delaware website, Delawareliberal.net, which this official says, posted the text of the e-mail on Monday. According to that posting, the e-mail reads: "It is one thing to have your country screwed over by socialists, it is far worse to be backstabbed by people pretending to be your friends. Political ass-kissing RINO's [Republicans In Name Only] like you deserve a bullet in the head. We will either rid the GOP of pieces of ____ like you, or we will start a new 'Common Sense Conservative' party and render you all useless."