Republican lawmakers are mulling plans to boost numbers of high-tech immigrants as Elon Musk, shown carrying his son, and other tech billionaires flex their expanding influence on Donald Trump and the GOP. | Andrew Harnik/Getty Images A Christmas Day social media brawl between President-elect Donald Trump’s backers in Silicon Valley and the MAGA base highlighted the looming battle facing the incoming White House and Congress over high-skilled immigration. Early conversations are already taking p...