yesterday. >> we will will be having a big announcement on wednesday having to do with tax reform. the process has begun long ago, but it formally begins on wednesday. >> reporter: so that was president trump telling his treasury secretary, steve mnuchin, to get it done, get tax reform done. it's very clear that he wants to score some legislative wins before his first 100 days are over. leland? leland: and we'll see what kind of concessions have to be done to make that happen. kristin fisher working the weekend as well. thanks, kristin. liz? elizabeth: well, the rain is not deterring thousands of people from hitting the streets here in washington where the march for science is underway. it's one of more than 500 rallies scheduled across the globe today, which is also earth day, to protest what they say is an attack on science. james rosen is on the ground at the national mall. james, tell us, what are you seeing? is the rain clearing up at all? >> reporter: it is not. in fact, it seems, elizabeth, to