"for cause" in the US usually implies a reason that is above and beyond bad performance, such as egregious or criminal actions (theft, fraud, abuse, sexual hara

"for cause" in the US usually implies a reason that is above and beyond bad performance, such as egregious or criminal actions (theft, fraud, abuse, sexual harassment, criminal negligence, etc.). not showing up on time enough, or being kinda crappy at your job generally would not qualify