Original sentence: Bloomberg was a staunch proponent of stop-and-frisk in New York City and has argued that it lowered the murder rate.He is regarded as socially liberal or progressive on multiple issues, supporting abortion rights, same-sex marriage, strict gun control measures, environmentalism and a pathway to citizenship for illegal immigrants.He opposed a timeline for withdrawal from the Iraq War, and criticized those who favored one.On economics and foreign policy issues, Bloomberg has tended towards a moderate stance
Edited sentence: Bloomberg was a staunch proponent of stop-and-frisk in New York City and has argued that it lowered the murder rate, though there is not much empirical evidence for this belief.He supported the Iraq war  and opposed a timeline for withdrawal from the Iraq War, and criticized those who favored one.However, he was a Republican Mayor and supported George W Bush's re-election in 2004.It has been estimated that under Mayor Bloomberg, there were 440,000 marijuana arrests and the people arrested for possession spent a cumulative 5,000,000 hours in police custody.Most arrests made from stop-and-frisk stops were for marijuana possession.Since stop-and-frisk disproportionately targeted people of color, this contributed to the disporportionate rate at which they were arrested for marijuana possession