FILE PHOTO: A poll worker places a mail in ballot into a voting box as voters drop off their ballot in the U.S. presidential primary election in San Diego, California, United States June 7, 2016. REUTERS/Mike Blake/File Photo
WASHINGTON (Reuters) - California is determined to force 2020 Democratic presidential hopefuls to make some hard choices.
The nation's most populous liberal state has moved its presidential nominating contest to early in the 2020 calendar, a shift its leaders hope will give it maximum impact on the selection of a Democratic nominee and push candidates to address progressive issues such as climate change.
