Trump wins, Ramaswamy drops out and endorsechim. Haley and DeSantis battle for the right to lose last.
https://www.bbc.co.uk/news/world-us-canada-67989443
Something that doesn't seem to have been picked up is turnout.
Yesterday turnout was over 40% lower than in 2016, the last time there was a Republican caucus not involving an incumbent president. Now there may be a bunch of reasons for this, such as:
1. The weather - no idea how yesterday compared to Jan 2016, but I guess it is always darned cold in Iowa in Jan.
2. That the result seemed certain so less likelihood for people to vote.
3. That while Trump is clearly preferred amongst the candidates there is less overall enthusiasm resulting in more people sitting on their hands.
If the reason is 1 or 2 then there is no concern for Trump. However if there is an element of 3, that may be worrying as it may suggest a softening of support amongst even the hard-core (registered Republican voters) if they are less willing to turn out to vote for him.