take a listen. >> to the gop establishment, if you stand on the platform, if you stand by your pledges, we ll stand with you. >> we have a disaster on our hands. we have a man right now that almost certainly will go down as the worst president in the history of the united states. >> all right. so let's bring in nbc news deputy political director mark murray. so, mark, we're getting those i guess unique quotes from donald trump but it feels like we haven't seen sarah palin firing up a crowd like that in a while. so what can we take from these latest stops? >> well, the campaign is really beginning to heat up. it was taking a while. president obama, of course, got in last week, filed his paperwork. all of a sudden now more and more people are beginning to get into the presidential contest. and we saw a flurry of weekend activity. of course, it was tied to today's tax day. a lot of tea party protests where republicans were railing against taxes and railing against president obama.