2(ish). CO is a regular primary in 2020 (post prop 107/108 in 2016). TX democratic party no longer uses caucus.

Several US territories and other states[1] hold democratic caucuses of one form or another, but are less notable due to timing/delegate count.

[1] https://www.nytimes.com/2020/02/04/us/politics/what-states-c...