“This is a long-lead business with highly capital-intensive investments—decisions that were made two, three and four years ago,” Barra said.

Last week, Trump attacked General Motors for building some of its Chevrolet Cruze compact cars in Mexico. He tweeted that the largest US automaker should make cars at home or face a hefty tariff.

GM said the imported cars represent less than five percent of the Cruze hatchbacks sold in the US. According to Barra, almost all of the sedans are built at the factory in Lordstown, Ohio.

The Detroit-based company has recently announced plans to lay off 2,000 employees at two US auto plants due to weak demand for small cars. GM is among automakers that prefer to have smaller cars manufactured in Mexico to take advantage of lower labor costs and have higher-paid American workers build more profitable trucks.

According to Barra, it is “too early to speculate” about the potential impact of any future border tax or tariff. She said the company’s strategy has much more in common with Trump’s goals for trade and jobs than differences.

“I very much look forward to being part of the solution that allows the country to be strengthened along with business, along with our manufacturing capability,” she said.

Barra is one of a group of CEOs advising Trump on economic issues. She declined to say whether has discussed the matter with him directly. People familiar with the case told the Wall Street Journal she has called Trump after his critical tweet and had a “cordial” conversation with him.

The US president-elect has repeatedly criticized local companies such as Ford and Toyota for moving jobs across the border. Trump threatened them with heavy border taxes. Last week, Ford canceled plans to build a small car factory in Mexico and announced 700 new jobs in Michigan. The company said the decision was not the result of Trump’s pressure.

Automaker Fiat-Chrysler said it would spend $1 billion in part to renovate a plant in Michigan to make some versions of its Ram pickup truck, which is currently assembled in Mexico.