Tens of thousands of Venezuelans clad in red flooded the streets of the capital on Thursday, saying a referendum that would end term limits is the only way Venezuelan President Hugo Chavez can complete what he calls a socialist revolution. Nearby, a few hundred opponents rallied in a square after the government denied their request to mount a giant march across the city, as they did last weekend. They have fought Chavez in a bitter struggle that culminates in Sunday's vote, which is expected to be close. Supporters jumped and screamed as Chavez rode through the crowd atop a red truck. They danced to salsa music booming from sound trucks, then listened rapt as Chavez addressed them.