The presidential race has a new big-name candidate as Florida Gov. Ron DeSantis officially announced his run Wednesday. The Republican is a headline machine, shaping national fights over COVID policies, education and immigration. But he faces an uphill climb against former ally Donald Trump. Lisa Desjardins discussed the race with former Rep. Carlos Curbelo, who served in Congress with DeSantis. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders