Is Donald Trump making America more expensive?

Through Donald Trump's tweets, you can see that Donald Trump likes to celebrate major firms who decide to produce domestically. However, here is this it says that isolationist policies will only make America more expensive.

In the market, producers compete to offer customers convenience and quality for the best price. Machines, the division of labor, and other innovations and institutions let firms offer better prices by decreasing their production costs. Lower costs enable them to pass savings on to buyers and accelerate competition with other businesses who compete to earn customers.

Essentially what they are saying is that by putting up artificial barriers to limit free trade, the products being sold will get more expensive.

Do you agree with this? What are your thoughts on this?