Norway’s prime minister reached out to U.S. Senator Lindsey Graham to address the controversy surrounding the Norwegian sovereign fund’s decision to sell all shares in Caterpillar over ethical concerns related to the company’s supply to Israel.

Graham warned Norway of potential U.S. trade tariffs or visa restrictions if the decision is not reconsidered, citing the fund’s large investments in the U.S. totaling over $1 trillion.

The decision to divest from Caterpillar was made independently by the fund’s board of Norges Bank following the recommendation of the Council on Ethics, a public body overseeing ethical guidelines for investments.

The prime minister clarified that the decision to exclude companies from the fund is not political, and management of the assets is kept at arms-length from the government to maintain independence.

The Norwegian sovereign wealth fund, valued at $2 trillion and invested in over 8,400 companies globally, has faced speculation about potential risks to its U.S. assets amid uncertainties surrounding economic policies under the Trump administration.

Read more at Yahoo Finance: Norway seeks to defuse clash with Trump ally over fund’s Caterpillar exit