MANILA, Philippines— The Senate blue ribbon committee led by Sen. Erwin Tulfo has resumed Monday its investigation into the flood control mess. Several lawmakers, including former Speaker Martin Romualdez, were invited to the hearing as resource persons. The four other members of the House of Representatives invited are Mamamayang Liberal (ML) Party-list Rep. Leila de Lima, Palawan Rep. Jose Alvarez, Iloilo Rep. Jullienne “Jam” Baronda, and Lanao del Sur