From Senators to news pundits, we are living in a society where interrupting is commonplace and accepted as a way of communicating.
Interrupting and talking over others can be something that is simply learned in childhood and carries over into adulthood. It may be a sign of insecurity in the interrupter and manifests this way. Perhaps it’s just narcissistic or a total lack of awareness on the part of the person doing the interrupting. And it certain circumstances, it can be a power play.