By Jam Sisante, Mark MerueƱas, and Howie Severino 06/23/2009 | 10:53 AM www.gmanews.tv The first in an occasional series on political advertising. Officially, the campaign period for next year's election will start eight months from now. But who's waiting? In only the first three months of this year, just three possible candidates have already spent a total of P230 million in "advocacy ads" -- thinly disguised campaign commercials on television and radio. Roxas and Villar lead in "advocacy ads" spending Nielsen Media Research identified the three as Senator Manuel "Mar" Roxas II (P140 million), Senator Manuel Villar Jr. (P80 million), and Senator Loren Legarda (P10 million). All three have given indications they're running for the presidency next year. The early electioneering is obvious to many TV viewers. But the Commission on Elections (Comelec) has already determined that the so-called advocacy ads do not violate election campaign laws sinc...