Here is a concise original summary based on the information published by the source. Mark Villar joins Senate majority bloc Inquirer.netMark Villar reclaims public works chairship in switch to majority bloc Philstar.comMark Villar switches side Daily TribuneAlan Cayetano: Senate minority bloc’s duty as ‘fiscalizers, oppositionist’ remain unchanged Manila BulletinMark Villar switches camps. Minutes later, family’s troubled firms make their move. Rappler For the full context and any later updates, use the original source link.