Camarines Sur Rep. Leni Robredo has gained more ground in the vice-presidential race and now shares the lead with Senator Bongbong Marcos in the latest ABS-CBN survey done by Pulse Asia Research.

Robredo is now the choice for vice-president of 30% of respondents, which is 4 points higher than her rating in the previous ABS-CBN Pulse Asia survey.

Marcos is the choice of 28%, down 3 points from the previous survey. On the other hand, Senators Francis Escudero (18%) and Alan Peter Cayetano (15%) didn't see changes in their ratings. Senators Antonio Trillanes IV and Gringo Honasan had 3% and 2% ratings, respectively.

A total of 4,000 respondents were polled from April 26-29, 2016, with the survey having a margin of error of 1.5%.

The survey covered both urban and rural respondents who were adults 18 years old and above and who are also registered voters with biometrics.

The respondents were asked to pick their vice-president from a sample ballot and a list of candidates if elections were held during the survey dates.

Marcos took the National Capital Region (NCR) and Luzon with 42% and 33%; Robredo led Visayas with 42% and shared statistical leads in Mindanao (28%) with Marcos (24%) and Cayetano (29%).

Robredo shares the statistical lead with Marcos across all social classes. Robredo polled 32% in classes ABC, 30% in class D, and 29% in class E.

Marcos polled 29% in classes ABC, 29% in D, and 24% in E.

Around 4% of the respondents picked "don’t know, refused, undecided, or none."

Escudero, meanwhile, remains the top 2nd choice in the vice-presidential race, according to the survey.

Balance Luzon (24,164,541) has the biggest number of registered voters followed by Mindanao (12,629,265), Visayas (11,316,789) and NCR (6,253,249).