Delaware businesswoman Michele Rollins (R) has decided to run for the First State’s only Congressional seat, a decision that will please GOP officials who had encouraged her to run to succeed Rep. Mike Castle (R).

“Today I will file the necessary legal documents to become a candidate for our Party’s nomination for Congress,” Rollins wrote Wednesday morning in an e-mail message to supporters. “I know the task ahead is difficult and challenging. I can’t do it without you. I need your help and support.”

Rollins, who is seeking political office for the first time, said that she strongly disagrees with the Obama administration’s policies and that the recently signed health care reform bill was “the last straw.”

Rollins, a philanthropist and frequent donor to GOP candidates and committees, will be able to spend significant personal resources on her campaign. Likely Democratic nominee John Carney, a former lieutenant governor, is well-funded after entering the race a year ago.

Several other Republicans will run in the Sept. 14 primary, including developer Glen Urquhart, who is portraying himself as a more conservative candidate than Rollins.

Castle is running for Senate, and Democrats are currently favored to win his seat in November.