receiving those documents. >> sir, good to have you with me. senator ben cardin. thank you for your time. i really do appreciate appreciate it. >> thank you. developing overnight, the trump administration expected to roll out and roll back strict federal relations on vehicle pollution and change the fuel efficiency standards for future cars. this announcement, which could come as early as tuesday, would not dock a key part of president obama's legacy about the environment. i want to bring in now gina mccarthy, former epa administrator under president obama. it is great to have you with me. let's just get right to it. explain what the trump administration, what you're hearing is the proposal. >> well, thomas, the trump administration is really challenging our effort to maintain strong environmental protections that are necessary for public health. you know, epa has been bipartisan for 40 years. these are big-deal things. i don't know why they've decided that our core values no longer include clean air and clean water, but that seems to be what