Students took part in February rally against President Maduro’s administration
Bipartisan bill would impose visa, asset bans
U.S. lawmakers renew calls for sanctions
Autocrat leaders both call United States 'stupid'
Human Rights Watch report documented abuses against more than 150 victims
Experts concerned about his willingness to work with U.S. on anti-drug, anti-gang efforts
Also use petrol bombs as police spray tear gas, water cannons