China is willing to meet reasonable demand for rare earths from other countries, but it would be unacceptable that countries using Chinese rare earths to manufacture products would turn around and suppress China.
Bob Paduchik, who also led the Ohio Trump campaign in 2016, called lawmakers urging them to support the legislation and stressing that the president was behind it as well.
Investors worry a referendum on mining in Imbabura, the province in which its flagship Cascabel copper-gold project is located, could jeopardize the mine's future.
An illegal strike that led to the dismissal of over 600 employees at the Mototolo mine run by Anglo American Platinum has been resolved and the workers will be reinstated.
James Marape, a former finance minister who became leader after winning a vote in parliament, put some of the world's biggest resources companies on notice over a perceived lack of wealth flowing from their projects back to communities.
Zambia says its decision to punish miner Vedanta's local operation for breaching environmental and financial regulations is a signal to other firms to follow the law.