A beam(maybe multiple beams from ground crossing at, or just some very high alternating potential, something like focused haarp) on tip of rocket targeting at path of it, ionizing just the closest molecules that are about to add friction to rocket.
Rocket having same signed static electrical charge so ionized particles (cores) don't add drag because they don't come close enough before rocket passes, or at least the air pressure at all heights is decreased by a good margin.
Just like rocket traveling in a bubble of vacuum. When vacuum applied only at tip, it could pull the rocket, increasing its velocity?
In other words, could it lessen space launch fuel consumption for friction?
How much energy needed? More than fuel of conventional ways? But ground based ionizators would make a lighter fuel depot for rocket, would it?