We would like you to assess the QUALITY of each of the following argument (discussing Gun Control) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gun control. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gun control.

SCOTUS has upheld "gun control" in principle repeatedly.
Valid

First you tried to link the existence of the second amendment with incidents of criminal deeds.
Valid

I posted the real story of the Ft. Hood incident and also a quote that only a good man with a gun can stop a bad man with a gun.

Valid