Donald Trump made a wealth of promises before taking office: building a wall along the border with Mexico, ditching Barack Obama’s flagship healthcare policy, and stopping Muslims entering the country were on his to-do list.

A year on, these are the policies he has managed to enact and the pledges he has broken:

Repealing Obamacare

Republicans should just REPEAL failing ObamaCare now & work on a new Healthcare Plan that will start from a clean slate. Dems will join in!

— Donald J. Trump (@realDonaldTrump) July 18, 2017

Mr Trump campaigned on a platform to repeal and replace the Affordable Care Act, Mr Obama’s healthcare reform policy that aimed to give all Americans, especially those from low-income families, affordable medical cover.

According to Dr Leslie Vinjamuri, an associate professor of international relations at SOAS, University of London, both sides of Congress plus swaying public attitudes to Obamacare stopped Mr Trump following through on a key campaign promise.

“Shockingly, despite the fact that (Trump) campaigned on how awful the affordable care act was,” she said, “the public opinion in support of Obamacare has risen quite significantly during his administration.”

“The last thing Congress wanted to do is return to their constituents and tell them that they’d gotten rid of their healthcare,” especially considering the upcoming midterms.

The wall

Eventually, but at a later date so we can get started early, Mexico will be paying, in some form, for the badly needed border wall.

— Donald J. Trump (@realDonaldTrump) April 23, 2017

Another of his key campaign pledges was to build a wall along the border with Mexico, paid for by the neighbouring country.

There is no wall covering the 2,000 mile-long border yet, although the department of homeland security did announce the names of potential contractors last August.

The wall is something Democrats have fiercely fought against funding, but Mr Trump maintains the wall will be built.

The president said on Thursday funding for the wall must be part of any deal to replace Obama-era legislation protecting undocumented children that he is threatening to ditch.

Tax reform

While campaigning, Mr Trump promised to eliminate the death tax, introduce a 15% flat rate for businesses, and simplify the tax code from seven brackets to three, based on income.

And in late December, the White House managed its first concrete win, pushing a tax bill through the house and just about getting it through the senate.

“Republicans were coming to the one-year mark and they wanted that success,” said Dr Vinjamuri.

Congratulations to Paul Ryan, Kevin McCarthy, Kevin Brady, Steve Scalise, Cathy McMorris Rodgers and all great House Republicans who voted in favor of cutting your taxes!

— Donald J. Trump (@realDonaldTrump) December 19, 2017

“They wanted to be able to go home and say they’d cut the corporate tax rate and given everybody a tax cut, and there was a time limit on that.”

That bill is now law, but does not do all that he promised. There are still seven brackets, the new corporate tax rate is 21%, and the death tax does remain – if only for the very wealthy.

Relaxed regulations

Great numbers on the economy. All of our work, including the passage of many bills & regulation killing Executive Orders, now kicking in!

— Donald J. Trump (@realDonaldTrump) June 12, 2017

One of the president’s first executive orders ruled that for every new piece of regulation introduced by a federal agency, two would have to be repealed.

He has also managed to repeal several Obama-era rules surrounding federal land management, schools, and labour laws for companies with government contracts.

The latter was a resolution he signed to repeal Obama’s Fair Pay and Safe Workplaces executive order, legislation which forced firms to be transparent about wages and stopped forced arbitration for sexual harassment cases at work.

“He has stripped a lot of regulations,” said Dr Vinjamuri. “He’s certainly made some progress on deregulation.”

Foreign policy

Despite often tweeting criticism of other world leaders, the US president has had some foreign policy successes.

One of his first moves as president was to withdraw the US from the Trans-Pacific Partnership, as promised.

While campaigning Mr Trump also said he would “cancel the Paris Climate Agreement”, and last June he announced the country’s withdrawal.

However, on Thursday, he said the country could “conceivably” rejoin.

When will all the haters and fools out there realize that having a good relationship with Russia is a good thing, not a bad thing. There always playing politics - bad for our country. I want to solve North Korea, Syria, Ukraine, terrorism, and Russia can greatly help!

— Donald J. Trump (@realDonaldTrump) November 12, 2017

In 2015 Mr Trump proposed a “total and complete shutdown of Muslims entering the US”, but that was later diluted to suspending immigration from countries “compromised by terrorism”.

A partial victory on that promise came after he signed an initial ban last January, blocking entry to nationals from several Muslim majority countries.

After multiple court battles, the supreme court ruled in December that the ban could be imposed.