On the off chance this question was asked in earnest:
The typical deflection from the US right is that the real problem is that we need to put more effort into addressing mental health. (and IMO there is some truth to that)
However, Reagan (R) dismantled funding for our mental health infrastructure and was responsible for the closing of many mental health treatment centers, and Republicans since then have (to my knowledge) voted against every effort to resurrect it.
They won't support restrictions on gun ownership because they say the problem is mental health, but they won't support spending on mental health either. (Most likely because they seem to oppose anything that would actually help people who suffer.)