(CNN) - One day after the Democratic party went up with an television commercial questioning Delaware GOP Senate nominee Christine O'Donnell's "fiscal responsibility," a major Tea Part organization says new TV and radio ads in support of O'Donnell are in the works.
CNN has learned that the Tea Party Express, the group that spent approximately $250,000 to help O'Donnell win an upset victory over longtime moderate Republican Rep. Mike Castle in last week's GOP primary, is now working on a similar effort in the general election.
"We already have radio and TV ads that are in the works, and we are also putting together a mail program to reach voters in the state," Tea Party Express political director Joe Wierzbicki tells CNN.
Wierzbicki says that they'll probably extend their ads buys to the expensive Philadelphia television market, as they did in the primary. The populous northern part of Delaware is covered by the Philadelphia market. And he adds that the commercials are a mix of ads supportive of O'Donnell and critical of New Castle County Executive Chris Coons, the Democratic Senate nominee.
Sunday the Democratic Senatorial Campaign Committee went up on television in Delaware with an ad attacking O'Donnell, a conservative commentator who launched failed bids in 2006 and 2008 for the Senate in Delaware and who was considered a longshot against Castle until she received an endorsement from former Alaska Gov. Sarah Palin and assistance from the Tea Party Express.
"She'll fit right in, in Washington. O'Donnell spends money she doesn't have. Hired employees she didn't pay. Stiffed businesses. Didn't pay her taxes," says the narrator in the commercial. "One of Christine O'Donnell's former employees summed it up: "We were constantly trying to hold her back from spending. She was financially completely irresponsible."
The ad seems to be aimed directly at Tea Party activists, who support O'Donnell. One of the tenants of the Tea Party movement is fiscal responsibility and the lowering of the massive federal budget deficit.
The National Republican Senatorial Committee has contributed $42,600 to O'Donnell's campaign, but they haven't announced whether they'll go up with their own ads in Delaware.
After O'Donnell's upset victory over Castle, the Rothenberg Political Report moved the race from "Lean Republican" to "Lean Democrat" and the Cook Political Report changed their rating, from "Likely Republican" to "Likely Democrat." Cook and Rothenberg are considered the top two non-partisan political handicappers.
"It speaks volumes about the desperate political straits Democrats find themselves in when they're spending money in a blue state like Delaware instead of states like Ohio, Indiana and New Hampshire where they appear to have written off their candidates," says NRSC Communications Director Brian Walsh.
O'Donnell reports raising just over $1.5 million since last week's primary, putting the pressure on Coons to stay competitive. Coons heads to Los Angeles for a fundraiser Monday night and later in the week he'll attend another fundraiser in Florida, where he'll team up with Vice President Joe Biden.
A Republican source says the rate at which O'Donnell's been raising money gives party officials the opportunity to divert funds that may have gone to Delaware and allows them to spend the cash in other states, such as California and Washington, where they say GOP Senate nominees are being outspent.
The winner in November will fill out the remaining four years of Biden's final term in the Senate. Biden stepped down from his seat after his election in November 2008 as vice president. Former Biden aide Ted Kaufman was named as an interim replacement, and is not seeking a full term. After much speculation that he would run for his father's old seat, Delaware Attorney General Beau Biden announced in late January that he would instead run for re-election as Delaware attorney general.
Follow Paul Steinhauser on Twitter: @PsteinhauserCNN