Andrew Cuomo, moderate and reformist Democratic governor of a blue state, given high marks even by Republicans. Until now:

A poll shows New York Republican voters for the first time disapprove of Gov. Andrew Cuomo’s performance following the Democrat’s push for a gun-control bill.

The Quinnipiac University poll finds 55% of Republican voters disapprove of Cuomo, with 27% approving of his job performance.

In December, 74% of Republicans approved of Cuomo’s performance.

Losing GOP support in a state rife with Democrats is unlikely to deter Cuomo from pushing his gun-control agenda. But it ought to serve as a warning to moderate Democrats in the House and Senate (remember them?) as they look toward 2014.

Oh, wait — it already has.