In other countries. Australia witnessed a staggering decline in suicides after their gun gun control went into effect.

From the linked study: "In the 18 years before the gun law reforms, there were 13 mass shootings in Australia, and none in the 10.5 years afterwards. Declines in firearm-related deaths before the law reforms accelerated after the reforms for total firearm deaths (p = 0.04), firearm suicides (p = 0.007) and firearm homicides (p = 0.15), but not for the smallest category of unintentional firearm deaths, which increased. No evidence of substitution effect for suicides or homicides was observed. The rates per 100 000 of total firearm deaths, firearm homicides and firearm suicides all at least doubled their existing rates of decline after the revised gun laws."

You say the highest rates of gun deaths are in Democrat-run urban areas, as though that's some sort of point in your favor. Doesn't it follow that the people who experience the most gun violence would be the ones to seek remedies for it?