and low income seniors, no change to social security benefits. that will be a battlefield with progressives and liberals over that chain cpi. a wonky mathematical way to try to close a budget deficit that would lead to smaller checks for some people. >> that's right and christine, you are exactly right. a lot of liberals who feel like it's an outright betrayal to do something like this. it is something that will really hurt seniors as well as other vulnerable americans and this will be a big battle. >> thank you, briana. let's go to zoraida for the rest of the day's news. >> we're expecting the president in the rose garden to have an address at 11:00 a.m. stay tuned for that here. take a look at this video mta setting off a powerful underground explosion underneath new york city. breaking through tough bedrock and making way for a huge subway expansion on manhattan's east side. it is set to cost 8.3 billion