If the Democratic primary in Pennsylvania were held Tuesday, April 1, Hillary Clinton would defeat Barack Obama by 12 percentage points, according to a recent SurveyUSA poll conducted exclusively for NBC 10 and three other Pennsylvania TV stations across the state.

However, the poll showed Obama gaining ground in the Keystone State, particularly in cities like Pittsburgh and Philadelphia, and among older voters, men and conservative Democrats.

Compared to an identical SurveyUSA poll released three weeks ago, Clinton is down two points and Obama is up five, with Clinton's previous 19-point lead cut to 12, the survey found.

The movement in support came almost entirely from men, according to the survey results. Clinton had led by five points but now trails by seven -- a 12-point swing to Obama.

To see this illustrated, go to SurveyUSA's exclusive interactive tracking graph here.

Among women, Clinton's lead remains largely unchanged. Among voters ages 50 and older, Clinton had led by 26 points and now leads by 22. Among voters under 50, Clinton had led by 12 points but now leads by two, a 10-point swing to Obama.

In southeast Pennsylvania, which includes Philadelphia and makes up 43 percent of likely Democratic voters, the candidates have traded places: Clinton had been up two points but is now down three. In southwest Pennsylvania, which includes Pittsburgh, Clinton had led by 31, but now is at 17, a 14-point swing to Obama.

In the northeastern part of the state, which includes Scranton, there is movement to Clinton.

The survey concluded that there is also movement to Obama from conservative and anti-abortion Democrats.

However, Clinton continues to dominate among voters focused on the economy, the No. 1 issue, and health care, considered the No. 3 issue, according to the survey.

Obama has gained ground but Clinton continues to lead among voters focused on Iraq, the No. 2 issue.

The survey data was collected from March 29 to March 31 in Pennsylvania. Of the 1,600 Pennsylvania adults interviewed, 1,405 of them were registered to vote.