Elon Musk gave about $44 million to his pro-Donald Trump spending group during the first half of October, federal disclosures showed on Thursday, as the billionaire stepped up his efforts for the Republican candidate in the Nov. 5 election. The contributions, disclosed in a filing to the Federal Election Commission by Musk’s America PAC group, come after a prior report showed he gave the group around $75 million over three months between July and September.