MANILA, Philippines — Sen. Robinhood Padilla on Monday said he is ready to fulfill his duty as senator-judge in the impeachment trial of Vice President Sara Duterte.The Senate, sitting as Impeachment Court, will begin the trial on July 6. It will try the four Articles of Impeachment against Duterte which the House of Representatives transmitted to the Senate."Isang karangalan po sa atin na maging (It would be an honor for us to be a) senator-jud…