When he took office, Trump pledged to erase all of his predecessor Obama's legacy, but he could not fulfill this goal after four years in power.

The Barack Obama administration is a constant target of US President Donald Trump's attack, especially when he faces challenges or crises.

This is the reason Trump repeatedly vowed to destroy all the legacy that Obama left, in order to "make America great again".

One of Barack Obama's most prominent legacies is the Affordable Care Act (ACA), also known as the Obamacare.

While the Obama administration and Democrats hailed Obamacare as a great achievement, Republicans did not support the program.

While President Obama remains in office and has the power to veto bills, the Republican opposition is only symbolic.

When the Republicans took control of both the White House and the bicameral parliament in January 2017, Obamacare's outlook turned bleak.

But, despite the Trump administration's pledges to "abolish and replace" Obamacare, Obama's legacy lives on when Trump's first term is coming to an end.

In 2017, the Republican-controlled House of Representatives passed the U.S. Health Care Act, which aimed to repeal much of the ACA.

Clodagh Harrington, associate professor of American politics at De Montfort University, and Alex Waddan, associate professor of American politics and foreign policy at the University of Leicester, are all in the UK, commenting on the effort to eliminate

During the Obama presidency, the majority of Americans said they did not see the ACA beneficial, but that view changed when it was threatened with elimination and the media reported on the number of people who could lose it

Throughout his first term, the Trump administration has relentlessly sought to eliminate Obamacare.

Healthcare is also an important battleground in this year's showdown between Trump and Democrat Joe Biden.

Biden's victory along with Democrats taking control of the two houses will help maintain and develop Obamacare.

The Obama administration's second most prominent legacy is the Delayed Deportation of Children to the United States Illegal (DACA) program, which has been in effect since mid-2012. This program has allowed about 700,000 children

In 2017, Trump tried to cancel the program but the US Supreme Court in July ruled that the Trump administration did not have enough legal grounds to cancel and DACA remained in place.

This makes this year's elections important, especially for those who live in the US but do not have the right to vote.

Meanwhile, the Biden administration will seek to turn DACA, which is an executive ordinance, into law, while pursuing additional reforms to pave the way for other undocumented people to legally live in the United States.

President Trump said in 2017 that the accord undermined the US economy, left many people out of jobs, undermined national sovereignty and put Washington at a disadvantage over other countries in the world.

But not only the Paris agreement, many other reforms of the Obama administration are also listed on the "black list" of Trump.

Once seen as the Obama administration's breakthrough, the CPP has shown the world's leading power to recognize man-made climate change and take initiatives to reduce carbon emissions to 2005 levels.

However, the CPP immediately faced opposition from dozens of governors, as they quickly took legal action to stop the plan seen as a threat to the economy.

When President Trump entered the White House, the path to dismantling this plan was cleared.

At the time, EPA was led by former Oklahoma Attorney General Scott Pruitt, who consistently denied that the climate crisis was a man-made phenomenon.

However, the earliest deadline for the US to legally withdraw from the Paris Climate Agreement is November 4, the day after the US presidential election.

Contrary to Trump, the Democratic candidate also pledged to make America, the world's leading polluting country, become a 100% green energy user by 2050. This means Obama's legacy still has.

Harrington and Waddan argue that the last Obama legacy that Trump is hard to erase is the moment he marked his victory in 2008. From a young, educated and radical political ideology, Obama became

Obama is the one who broke the long-standing "invisible" barriers for people of color in America.

This year, the issue of discrimination came to the fore in the United States after the death of George Floyd, a colored man who was nailed for nearly nine minutes by police in Minneapolis in May.

Analysts said that the November 2020 election was of great significance, when US voters had the choice to continue to deny the progress that the first black president made in eight years in office when leaving Trump.