Considering the poll's 3-percent points margin of error, the three candidates were seen to be caught in a statistical tie in the general election.

The poll also showed the equally high marks from voters on the economic issue, with about two-thirds of those surveyed saying each of the candidates would do a good job in handling this top concern, including McCain whose party was criticized for the country's economic woes.

Democratic presidential candidate Senator Barack Obama speaks during a town hall meeting at the Community College of Beaver County in Monaca, Pennsylvania March 17, 2008. (Xinhua/Reuters Photo) 

"The fact that McCain is currently holding his own on the economy with the two Democratic candidates does help to explain why the general election matchups are so close even though most Americans think the country is in a recession," CNN Polling Director Keating Holland said.

The 71 year-old Arizona Senator also gained more confidence from voters in handling terrorism issue, while Obama and Clinton scored significantly lower.