A poll released on Wednesday found that more registered voters thought electing Barack Obama is riskier compared to John McCain.

U.S. Democratic presidential candidate Senator Barack Obama smiles as the audience sings him "Happy Birthday" during a campaign stop at the Lansing Center in Lansing, Michigan August 4, 2008. [Xinhua/Reuters Photo]

According to the poll by CNN and Opinion Research Corp., 57 percent of the 914 interviewed said that the Democratic presidential candidate would be a risky choice, compared to 54 percent having the same feeling about his Republican presidential rival.

A total 31 percent agreed that Obama could be a "very risky" choice while only 21 percent said the same of McCain, the poll showed.

But when asked which candidate would be "somewhat risky," 33 percent chose McCain, while 26 percent named Obama, it added.

Show from the poll, Obama and McCain remain in a tight race for the White House with no more than 100 days left before the November showdown.

According to the CNN's "poll of polls" released on Tuesday, Obama maintained a 5-percentage-point lead over McCain, at 48 percent to 43 percent, but there was still 9 percent undecided.