Suddenly, with the poll numbers no longer such a sure lock for Hillary Clinton as they once were in Iowa, and the caucuses tonight, Bernie Sanders has decided that well, maybe her emails are a problem after all.

Asked Sunday by CNN’s Jake Tapper on “State of the Union” whether voters should interpret his refusal to engage Clinton on the email issue to mean that Clinton did nothing wrong, Sanders replied with a firm, “No.”

“Nope, nope. That is not, I think, a fair assessment. That is, I think, a very serious issue,” Sanders said. “There is a legal process taking place, I do not want to politicize that issue. It is not my style.”

Sanders famously said in the first Democratic debate that he was tired of hearing about Clinton’s “damn emails,” brushing aside one of the biggest issues Republicans have raised to attack Clinton during the 2016 presidential cycle.

.@BernieSanders: @HillaryClinton's emails are a "very serious issue" https://t.co/RtmjRZHBh9 https://t.co/6gpwa6ngNu

— CNN (@CNN) January 31, 2016

Amazing how those “damn emails” now seem to matter so much, now that the race is a statistical dead heat within the margin of error, according to Real Clear Politics.

All this is happening as the Democratic establishment is freaking out that Sanders might actually win Iowa.