Mark Zuckerberg has formally cut ties with the pro-immigration group he helped launch more than a decade ago as his philanthropy retreats from political advocacy and narrows its focus to science amid President Donald Trump’s return to power.The Chan Zuckerberg Initiative, the philanthropy founded by Zuckerberg and his wife Priscilla Chan, ended its relationship with FWD.us earlier this year, people familiar with the matter told Bloomberg News.The split leaves the immigration and criminal justice reform grou ...