By Tim Reid and Ted Hesson (Reuters) -The mayor of the Texas border city of El Paso declared a state of emergency on Saturday, citing the hundreds of migrants sleeping on the streets in cold temperatures and the thousands being apprehended every day. Mayor Oscar Leeser, a Democrat, said the emergency declaration would give city authorities the resources and ability to shelter migrants who have crossed the Mexican border. “We wanted to make sure people are treated with dignity. We want to make sure everyone is safe,” Leeser told reporters. The move comes as El Paso, a Democratic stronghold with…