Because, surprise, surprise, he put out a false ad.
Via Free Beacon:
A political action committee launched and bankrolled by liberal billionaire George Soros is pulling out of San Diego’s district attorney race.
The California Justice & Public Safety PAC, which was established by Soros to support Geneviéve Jones-Wright, a far-left public defender, recently pulled an advertisement depicting District Attorney Summer Stephan as having a backlog of rape kits that needed to be tested. The ad came under fire for being false and misleading.
Now, the PAC is leaving the race entirely. Soros’s PAC has cancelled all future advertisements in support of Jones-Wright, according to television station managers in the region.