Newt Gingrich was just days away from the Jan. 31 Florida Republican presidential primary when he told reporters that his campaign was down to its last $600,000.

Five losing contests later, Gingrich and Winning Our Future, an outside political action committee supporting him, are almost silent on television airwaves, offering free water and coffee at events, and revamping a fundraising strategy based largely on the support of a single wealthy backer, Sheldon Adelson, and the Las Vegas casino owner’s family.

In the past seven days, Winning Our Future has spent $61,290 on broadcast television advertisements, compared with $636,920 spent by Mitt Romney and a super-PAC backing him, Restore Our Future, according to data compiled by New York-based Kantar Media’s CMAG, a company that tracks advertising.