It isn't immigration, it's illegal immigration. It's also against the abuse of H1 visas. Incidentally Tata was a major donor to the Clinton Foundation and logically she supports H1 abuses:

Here's a document from the 2008 Obama campaign about Clinton and her coziness with Indian H1 abusers: http://graphics8.nytimes.com/packages/pdf/politics/memo1.pdf

Note that is a document from the Obama campaign -- not some republican hit piece.

Libertarians do favor free trade, however free trade doesn't exist as long as governments (such as China,) manipulate currency or (such as France, specifically with Airbus,) provide heavy state subsidization for certain industries in order to compete with companies that aren't as subsidized.

Free trade requires an end to all subsidies and market-distorting practices that disadvantage competitors.

Trumps trade stances aren't in opposition to free trade in as much as they're in opposition to unfair trade -- China being a great example. US companies have to compete in manufacturing essentially with one hand tied behind their back -- stricter environmental rules, tougher labor rules and much higher taxation compared to China. So allowing unrestricted Chinese trade isn't 'free trade.'

Not defending Trump or necessarily bashing Clinton, just providing some context for his 'opposition' to free trade and immigration.

Trump's trade positions aren't much different than the EU -- when I import an American product into France, I pay huge duties and taxes -- importing something to the US from France -- rarely do I get hit with a huge tax bill from FedEx or UPS.

I even had to pay taxes on $100 worth of kids clothes I ordered from the US. I've never had that happen when I bought something from the EU and had it shipped to the US.