Critics who were worried about Donald Trump's campaign positions have been encouraged by his shifts, but this has also upset some of his supporters. Trump has a history of modifying his positions during his campaign, so it is possible that he may change his stances again before or after he is inaugurated on Jan 20. One example of this is his changing position on prosecuting Hillary Clinton. During his campaign, Trump promised to prosecute Clinton for her use of a private email server and alleged abuses of her position. However, during a debate on Oct 9, he stated that he would appoint a special prosecutor to jail Clinton if he won. In a Nov 22 interview with the New York Times, Trump suggested that he no longer wanted to prosecute Clinton, stating that he wanted to focus on moving forward rather than looking back. I have no intention of causing harm to the Clintons. I truly do not want to. However, when asked if he was completely ruling out the possibility of investigating Clinton, he answered "no." Regarding climate change, Trump has dismissed global warming as a hoax and during his campaign, he expressed a desire to withdraw the United States from the 2015 Paris Agreement involving nearly 200 countries, which took effect on Nov 4. Instead, he has stated his intention to continue the development of affordable coal, shale, and oil. A source from Trump's transition team stated on November 12 that his advisers were exploring ways to avoid the lengthy process of withdrawing from the climate accord. In an interview with the Times on November 22, Trump was asked if he planned to remove America from the forefront of addressing climate change, to which he responded, "I am considering it with an open mind. We will examine it closely." When asked if he believed human activity contributes to climate change, he acknowledged, "I believe there is a connection. There is some influence." It all depends on the amount. During the campaign, Trump expressed his intention to repeal the Affordable Care Act established by President Barack Obama. He criticized Obamacare as a failure and proposed a replacement plan that would grant states more authority over Medicaid and permit insurers to sell plans nationwide. In an interview with the Wall Street Journal on Nov 11, Trump mentioned the possibility of retaining certain aspects of the law, such as allowing parents to keep adult children up to age 26 on their insurance policies and prohibiting insurers from denying coverage to individuals with pre-existing conditions. Trump stated to the Journal that Obamacare would either be modified or completely eliminated and substituted with a new plan. During his campaign, Trump promised to build a wall along the US-Mexican border, have Mexico pay for it, deport illegal immigrants, and ban Muslims from entering the country to combat terrorism. While he never took back these promises, he later modified his language to suggest temporarily suspending immigration from regions considered to be exporting terrorism and lacking adequate vetting procedures. In a "60 Minutes" interview on Nov 13, Trump confirmed his plan to build a wall, but mentioned it could be a combination of wall and fence. He mentioned that certain areas would require a fence while others would need a wall, as he is skilled in construction. When asked about deporting illegal immigrants, he stated that the focus would be on those with criminal records, estimating the number to be between 2 to 3 million. Trump also expressed support for using waterboarding and other harsh interrogation methods on terrorism suspects, despite it being considered torture and banned under President Obama. During an interview with the Times on November 22, Trump mentioned that he was struck by Marine General James Mattis' response when asked about waterboarding. Mattis stated that he preferred cigarettes and beer over torture to obtain information. Although Trump's opinion on waterboarding remained unchanged, he was impressed by Mattis' perspective that waterboarding may not be as effective as commonly believed.