Or because Trump and his campaign take huge money from the oil companies? It is a win-win for Trump, he can boast himself about protecting US jobs and interests of his money donors.
Obama could’ve done the same? Actually he decided to lift a ban on Crude Oil exports. The oil from shale and fracking that flooded the markets in the past years.
Obama's admin was more tempered when it came to oil+gas+petrol+coal.
The admin increased exports, but it also restrained oil exploration in US waters (especially after Deepwater Horizon) and didn't open exploration to most of Alaska's National Wildlife Refuge (ANWR) or just rubberstamp the Keystone XL pipeline (ironically the smaller Keystone pipeline had a fairly large spill the same week as the Trump admin approved the Keystone XL).
That's not to say that the Obama Admin was nearly as "anti-oil" as it was portrayed in conservative-biased news. They were remarkably accommodating when the cost-benefit analysis was positive for the country.
There's a lot of things to be said about Trump and economic protectionism, but saying it's entirely fueled by donor pressure is oversimplifying the situation.
Source, please? Given the absurd amount of corruption going on in the administration (i.e. the missing inaugural funds and Mar-a-lago vacations, to name just a tiny fraction) and Trump's own charities, I find the idea that he spent even a penny of his own money on his campaign laughable based on first principles. I haven't seen any evidence to the contrary, other than his own patently unreliable rhetoric.
http://www.politifact.com/truth-o-meter/statements/2017/nov/...
"Trump received about $239 million from donors who gave less than $200 in total. That amounts to 69 percent of the Trump campaign’s individual contributions;
Hillary Clinton received about $137 million from $200-or-under donors. That made up 22 percent of the campaign’s individual contributions;"
https://www.usatoday.com/story/news/politics/onpolitics/2016...
"President-elect Donald Trump didn't need $100 million of his money to win the White House in the end.
Trump contributed another $10 million to his presidential campaign in the closing days of the election, bringing his total investment in the race to $66.1 million, new filings confirm."
[1] https://www.fec.gov/files/bulk-downloads/index.html?prefix=b... (I wasn't able to load indiv16.zip and analyze it but the total loan amount from the other data is a only few million shy of the $66 million total).