lisa desjardins has our report. >> so i want to make a big play for california. should i?reporter: one day after clinching the g.o.p. nomination, donald trump kept up his push for the golden state. outside his fresno event, protesters kept up their push too. but elsewhere, trump gained new-- if lukewarm-- words of support from a former opponent, florida senator marco rubio. >> i don't want hillary clinton to be president. if there's something i can do to help that from happening, and it's helpful to the cause, i'd most certainly be honored to be considered for that. >> reporter: trump, too, is talking about hillary clinton. >> the inspector general-- who's a democrat-- did a big, big number on her. i don't know how she can continue to run, i'll be honest with you. how does she continue to run? do you think hillary looks presidential? >> crowd: nooo! >> reporter: like trump, the two remaining spent their campaign day in voter-rich california, with polls showing a much tighter race, as the june 7 primary nears. bernie sanders went big, rallying with union workers on the san