. . .But Zuckerman – who would likely skip the Democratic primary and challenge Gillibrand in the general election as a Republican-Independent – poses a far graver threat to the national political status quo. The New York billionaire who owns one of the Democratic Party’s loudest megaphones, the New York Daily News, backed Barack Obama in the 2008 campaign but has emerged as a bitter White House critic, and his entry into the race would put Republicans clearly within striking distance of retaking the Senate.