GETTYSBURG, Pa. (AP) - Rick Santorum says his presidential race is over -- but, in his words, "we are not done fighting."

As he announced the suspension of his campaign today, he said he had taken his presidential bid farther than anyone expected, and that he would "continue to go out and fight and defeat President Barack Obama."

Santorum had hoped to keep his campaign going through the Pennsylvania primary in two weeks. But he decided to fold after his severely ill 3-year-old daughter, Bella, spent the weekend in the hospital.

He ran on his conservative credentials and his experience in the House and Senate, but his campaign was hobbled by a lack of money and organization.

Santorum said even though he didn't accumulate the delegates he needed, he was "touching hearts" with his conservative message.

Santorum would have needed 80 percent of the remaining delegates to win the nomination before the party's convention in Florida in August.