Rubio working to play a role at GOP convention WASHINGTON — Marco Rubio is working to play a role at the Republican National Convention even as his rivals scramble to pick off convention delegates claimed by the Florida senator before he suspended his campaign. Rubio has sent letters to Republican officials in states where he has won delegates, charging he wants to keep his delegates, even though he’s no longer an active candidate. Representatives from Rubio’s network said the former candidate wants to retain his delegates in order to keep his options open in the coming months.