By Rommel C. Lontayao, Reporter The Manila Times www.manilatimes.net Vice President Noli de Castro topped the latest survey of likely presidential candidates for the 2010 elections, but former Senate President Manuel Villar Jr. narrowed the gap. In a poll conducted by Pulse Asia from October 14 to 27, some 18 percent of the respondents said de Castro is their first choice as president in the next elections. Villar and former President Joseph Estrada were tied for second, with 17 percent each. And in a bittersweet development for Villar, who resigned as Senate president on Monday (see related front-page story), his popularity surged five percentage points from the last Pulse Asia survey that gave him only 12 percent. Senator Francis Escudero was the fourth-most popular choice with 15 percent, followed by Senator Loren Legarda with 14 percent. The other names picked by respondents include Senator Panfilo Lacson with 7 percent; Senator Manuel Roxas 2nd, 6 percent; and Makati City Mayor J...