USA HISTORY

Detailed explanation-1: -Obama signed many landmark bills into law during his first two years in office. The main reforms include: the Affordable Care Act, sometimes referred to as “the ACA” or “Obamacare", the Dodd–Frank Wall Street Reform and Consumer Protection Act, and the Don’t Ask, Don’t Tell Repeal Act of 2010.

Detailed explanation-2: -Obama sought re-election for a second term in 2012, running virtually unopposed in the Democratic primaries. His opponent in the general election was former governor of Massachusetts Mitt Romney. Obama won 332 electoral votes, defeating Romney who gained 206.

Detailed explanation-3: -U.S. foreign policy during the presidency of Donald Trump (2017–2021) was noted for its unpredictability and reneging on prior international commitments, upending diplomatic conventions, embracing political and economic brinkmanship with most adversaries, and stronger relations with traditional allies.

Detailed explanation-4: -Obama initiated the Cuban thaw, providing diplomatic recognition to Cuba for the first time since the 1960s. His administration also negotiated the Joint Comprehensive Plan of Action, an accord in which Iran agreed to limit its nuclear program.