Sherritt International Corp rebuffed its largest investor’s request for a special meeting to let shareholders vote on replacing its chairman and another board director, as the company faces scrutiny over its discussions with an ally of US President Donald Trump. The Toronto-based miner said Friday the request was ineffective under Canadian law because it had already called its annual meeting. Even so, Sherritt said it will put Kyma Capital’s proposals to shareholders at its December 15 annual me