though some departments have temporarily dropped edped edped drone use because of privacy concerns. >>> the battle over immigration reform. a deal in congress could be imminent. nancy cordes is on capitol hill. nancy, good morning. >> reporter: good morning to you, charlie. a negotiation going on for several days among a group of 10 or 15 senate republicans. one of the leaders of that effort, senator bob corker of tennessee, told us last night they're on the verge of a breakthrough and could have something to announce today. here's why what they're working on is so critical. a number of senate republicans have been withholding their support from this sweeping immigration reform bill. because they feel the border security requirements in it are just too lax. and so they've been going back and forth, talking about additional measures increasing border fencing. dramatically increasing the number of border agents. and beefing up e-verify. that's a program that makes it easier for employers to determine whether their workers are here legally or not. sow supporters of this bill don't just w