The handcuffing of Sen. Alex Padilla (D-Calif.) raises the stakes for future clashes between Democrats and the administration as acts of protest have been met with swift law enforcement action. Democrats have vowed to continue their pressure campaign on the administration over its immigration policies,

By Omar Younis, Bo Erickson, David Morgan and Richard Cowan LOS ANGELES/WASHINGTON (Reuters) -Democratic U.S. Senator Alex Padilla was shoved, forced to the ground and handcuffed by security after attempting to ask a question at a press conference on Thursday held by Homeland Security Secretary Kristi Noem about immigration raids.