This is certainly a depressing chronicle of death and tragedy. But Rubio’s statement stands up to scrutiny — at least for the recent past, as he framed it. Notably, three of the mass shootings took place in California, which already has strong gun laws including a ban on certain weapons and high-capacity magazines.

Gun-control advocates often point to the experience in other countries that have enacted gun laws that heavily restrict gun ownership; as we have shown, quantitative measures of cross-comparative crime statistics, especially where the crime is not consistently defined (i.e., “mass shooting”), usually end up being apples-to-oranges comparisons. It is possible that some gun-control proposals, such as a ban on large-capacity magazines, would reduce the number of dead in a future shooting, though the evidence for that is heavily disputed. But Rubio was speaking in the past, about specific incidents. He earns a rare Geppetto Checkmark.