Some basic math for the unenlightened.

America has 330 million guns which is roughly the population of America. Rather put then, there is one gun for every man, woman and child alive in the USA. 75 % of the population does not own any weapons. That means 25% of Americans do. 3% own half of the total guns, or 165 million weapons. That is roughly the amount of Americans who hold Phds (3.27%). That leaves the other 22% to own 165 million weapons. 22% is the percent of people who have blue eyes world wide, not just in the USA where the numbers are slightly higher at 33% of whites having Blue Eyes. Gun nuts, that 3% or about 10 million people. own on average 16.5 weapons each. The other citizens armed have on average 2 guns per person. One might assume, one is a long gun, like a rifle and the other a handgun.

1 in 5 or 20 % of the population will have some form of mental health issue. 1% will have a bipolar disorder. Therefore of the 10 million people who own 16 or more weapons on average in the USA, 100 000 of them will be bipolar. How many of them will resist the urge to kill? How many will ever see anything wrong with have so many guns and hearing voices telling them or ordering them to kill?
How many indeed?

Three of the top ten mass killings by gun violence have occurred in the last year. The number of school shooting so far is 18 and we are not even finished February 2018 yet. In 45 days we have had one school shooting every 2.5 days. Twice a week and the trend line is increasing. Yet despite all of this, the only gun control law to pass congress was to remove restrictions on people with mental illness from owning guns. Who says Congress does not care?