My colleague Ken Vogel reported this week that Sheldon Adelson talked of giving “at least $1 million — and possibly much more — to the Mitt Romney-affiliated super PAC Restore Our Future.”

Well, now we’re getting a better sense of just how much more.

Vogel emails:

Since the story posted, I’ve had multiple sources tell me that Adelson talked about donating as much as $10 million to Restore Our Future, which would make him the super PAC’s biggest donor by far.

That’s in addition to expected Adelson donations to Crossroads Grassroots Policy Strategies, the 501(c)4 non-profit group that has barraged Obama with tough ads, giving Romney air cover as he recover from his bruising GOP primary.

Crossroads GPS, which was conceived by Karl Rove, does not disclose the names of its donors, so it’s unlikely we’ll know for sure how much – or even whether – Adelson ends up giving.

But the prospect of him giving big to both it and Restore Our Future is notable for couple reasons. First, it would suggest a willingness by Adelson, whose family gave $21 million to a pro-Newt Gingrich super PAC, to be a team player by supporting Romney, who he described as recently as March “not the bold decision-maker like Newt Gingrich is.” Second, it would call into question the ability of the Crossroads outfits to position themselves as the clearinghouse for top donors seeking to influence the presidential race.