greenhouse gases. Bloomberg supported the Iraq War and opposed creating a timeline for withdrawing troops. Bloomberg has sometimes embraced the use of surveillance in efforts to deter crime and protect against terrorism. During and after his tenure, he was a staunch supporter of stop-and-frisk. In November 2019, Bloomberg apologized for supporting it. He advocates reversing many of the Trump tax cuts. His own tax plan includes implementing a 5 percent surtax on incomes above $5 million a year and would raise federal revenue by $5 trillion over a decade. He opposes a wealth tax, saying that it would likely be found unconstitutional. He has also proposed more stringent financial regulations that include tougher oversight for big banks, a financial transactions tax, and stronger consumer protections. He supported decreasing estate-tax threshold to collect more estate taxes and close tax avoidance schemes. According to Propublica investigation he set up multiple GRATs thus shielding parts of his fortune for his heirs. Bloomberg stated that running as a Democratnot an independentwas the only path he saw to defeating Donald Trump, saying: "In 2020, the great likelihood is that an independent would just split the anti-Trump vote and end up re-electing the President. That's a risk I refused to run in 2016 and we can't afford to run it now." Philanthropy In August 2010, Bloomberg signed The Giving Pledge, whereby the wealthy pledge to give away at least half of their wealth. Since then, he has given away $9.5 billion overall including $3.3 billion in 2019. According to Chronicle of Philanthropy, he gave away the most money of any philanthropist in 2019. His Bloomberg Philanthropies foundation focuses on public health, the arts, government innovation, the environment, and education. Through the foundation, he donated or pledged $767 million in 2018, and more than $1 billion in 2019. 2011 recipients included the Campaign for Tobacco-Free Kids; Centers for Disease Control and Prevention; Johns Hopkins Bloomberg School of Public Health; World Lung Foundation and the World Health Organization. According to The New York Times, Bloomberg was an "anonymous donor" to the Carnegie Corporation from 2001 to 2010, with gifts ranging from $5 million to $20 million each year. The Carnegie Corporation distributed these contributions to hundreds of New York City organizations ranging from the Dance Theatre of Harlem to Gilda's Club, a non-profit organization that provides support to people and families living with cancer. He continues to support