This is such a complicated issue. I wish we had a better understanding of what's happening here than a simple Right vs Left argument.
Putting America on the gold standard will fundamentally change how the world economy operates. The dollar-based currency operates on a debt system, which almost nobody buying and selling in this system even understands. So, some will insist that this is a political issue, but it isn't. It's about who gets to say what currency is used for trade between nations.
Right now, oil, as a chief energy source for every country on earth, is the most reliable store of value. We trade oil in dollars. If we switched to trading oil in gold, then moving to a gold standard would make sense. Until then, talk about a gold standard is more political gamesmanship.