Trump said he would support a temporary suspension of the federal gas tax during a meeting in the Oval Office. Kevin Dietsch/Getty Images Trump says he backs suspending the federal gas tax as fuel prices climb during the war with Iran. Federal taxes add 18.4 cents per gallon to regular gas in the US. The average gas price in the US has spiked from $2.98 before escalations in Iran to $4.52 a gallon on Monday. President Donald Trump said Monday that he supports suspending the federal gas tax as fuel prices surge during the war with Iran. Speaking during a meeting with reporters in the Oval Office, Trump pledged support for planned legislation by Republican Sen. Josh Hawley of Missouri to suspend the federal levy on gasoline and diesel fuel temporarily. Asked how long he would want the gas tax suspended, Trump said: "Until it's appropriate." The federal government collects an 18.4-cent-per-gallon tax on gasoline and a 24.4-cent-per-gallon tax on diesel fuel.…