[aristeides]

Give me an example of a sentencing disparity that was struck down that did not involve either a suspect class or a fundamental right.

[Torie]

One does not yet exist, that I know of. I think my post above suggested as much.

[AntiGuv]

That is reductio ad absurdum. Any given statute may be struck down if it fails rational basis review as well. If Kansas is able to establish a rational objective which requires the sentencing disparity, then the Kansas statute will get upheld.