Shiva Ayyadurai, who claims to have invented email, officially filed to challenge liberal hero Sen. Elizabeth Warren in Massachusetts’ Senate race next year.

Ayyadurai’s filed documents with the Federal Election Commission on March 17 and they were recently posted online, Arstechnica reported.

Earlier this month, Ayyadurai received support from former Boston Red Sox Pitcher Curt Schilling, who had himself considered running against Warren.

But Ayyadurai’s Republican credentials may not be rock-ribbed, as FEC filings showed he gave $2,000 to John Kerry’s failed presidential bid in 2004. He did not make any more political contributions until 2016, when he donated $2,700 to Trump Victory. 

Ayyadurai has long claimed that he invented email between 1978 and 1982, and has sued website Techdirt, which called him a “fraud,” and tech site Gizmodo’s now-defunct parent site Gawker, which led to stories being removed.

Most consider email to have originated with ARPANET, the predecessor to the Internet, which had electronic mail capabilities by the mid-1970s.

Inside Elections With Nathan L. Gonzales rates the race as “Currently Safe Democrat.”