Elon Musk visited the National Security Agency on Wednesday, current and former U.S. officials said, meeting with leadership a week after saying the intelligence and cybersecurity outfit needed an overhaul.

A new CNN/SSRS poll shows that 53 percent of Americans hold an unfavorable opinion of the world's richest man.

SpaceX and Tesla — have submitted letters lobbying the U.S. trade representative on Trump administration tariff policies. The letters come as Musk oversees an effort to slash federal government spending and employee headcount at the behest of President Donald Trump.