OTTAWA—Government House leader Mark Holland is urging the Conservatives to reconsider their rejection of a compromise proposal that would allow MPs to finally see unredacted documents related to the firing of two scientists at Canada’s highest-security laboratory. In a letter Tuesday to his Conservative counterpart, Gerard Deltell, Holland reiterates his proposal to allow a special all-party, security-cleared committee to review all the documents, aided by three former senior judges who would decide whether or how any disputed material could be released publicly without jeopardizing national security. He cites articles by several experts who’ve recently backed the government’s contention that Canada’s national security would be harmed by complying with opposition demands that the documents be turned over to a regular committee of MPs. Under a House of Commons order passed by opposition parties last spring over the objections of the Liberal minority government, the documents would be vetted by the parliamentary …