Find out who the Los Angeles County Federation of Labor is endorsing for March 2020 here: https://thelafed.org/march-2020/
Please be aware, Los Angeles voting has changed:
"In L.A. County, we have upgraded from polling places to Vote Centers. Voters now have the option to cast a ballot in-person at any Vote Center in the County. Vote Centers look and feel like polling places, but provide additional modern features to make voting easy and convenient. Having a single day to vote in-person is now a thing of the past. Voters in L.A. County will now have 11 consecutive days to vote in-person at any Vote Center Countywide.
Vote Centers for the March 3, 2020 Presidential Primary Election open February 22 - March 3." - Source: lavote.net
To find out more, please visit: https://lavote.net/home/voting-elections/voting-options/new-voting-experience/