Trump has access to a little-used tool that could lower oil prices

President Donald Trump has repeatedly expressed concerns about energy costs.
Rising gas prices could create a political headache for Republicans ahead of the midterm election.
Some analysts think Trump could turn to an emergency US oil reserve.
"REDUCE PRICING NOW!"
That was President Donald Trump's message to OPEC last week, adding that "gas prices are up & they are doing little to help." 
It was just the latest in a string of tweets taking aim at the oil cartel about energy