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Dalton McGuinty served as Premier of Ontario for 10 years, from 2003 to 2013. During his tenure, he implemented significant reforms in healthcare, education, and the environment. He also oversaw the province's economic recovery from the 2008 financial crisis. McGuinty's legacy includes the introduction of full-day kindergarten, the creation of the Ontario Health Insurance Plan (OHIP+), and the implementation of a cap-and-trade system to reduce greenhouse gas emissions.