Another day, another court case for Sheldon Adelson.

On Monday, the Nevada Supreme Court heard a First Amendment case that pitted the Las Vegas Sands chairman against a national Jewish political group over an online petition posted in 2012, Associated Press reported.

At issue was an internet ad four years ago that alleged Adelson used “prostitution-tainted money from casinos in China” to fund Republican presidential campaigns in the United States, which, in turn, led to former Republican presidential candidate Mitt Romney to reject the Sands CEO’s campaign contributions.

The online petition used a “hyperlink” to an Associated Press news report on a judicial proceeding, effectively citing “the AP report as evidence that prostitution was tolerated at Sands’ Macau casinos.” This has prompted Adelson to file a suit against the National Jewish Democratic Council and two of its officers, David Harris and Marc Stanley, who he accused of “assassinating” his character with their false claims that “personally approved illegal activities in Macau resorts owned by Sands China Limited.”