Jack Welch, the former chief executive officer of General Electric Co., will stop writing for Thomson Reuters Corp. and Fortune magazine after backlash to his Twitter post suggesting President Obama’s administration manipulated employment data for political gain.

Welch sent an email to Reuters Editor-in-Chief Steve Adler and Fortune Managing Editor Andy Serwer saying he and his wife, Suzy, were terminating their contract and would no longer contribute to Reuters or Fortune. The print title had agreed to pick up the column. A Reuters spokeswoman, Barb Burg, confirmed Welch was leaving.

The move followed criticism by Serwer of Welch’s comments on Friday’s U.S. unemployment report and a Reuters story quoting a money manager who described Welch’s statements as laughable, Fortune said. The Obama administration defended the U.S. Bureau of Labor Statistics, which computes the figures.

Welch said he and his wife were planning a piece in the Wall Street Journal, according to the email, which was confirmed by his assistant, Roseanne Badowski.

“In terms of traction, it’s just a better fit for us,” Welch said in the message, posted on Fortune’s website.

Welch declined to comment further, Badowski said. Ashley Huston, a spokeswoman for Journal publisher Dow Jones & Co., declined to comment.

Welch has contributed $5,000, the maximum, to Republican presidential candidate Mitt Romney’s campaign and described him on CNBC as “the most qualified leader” to seek the office in his lifetime. His Oct. 5 Twitter message snowballed as commentators and politicians weighed in on social-media websites and television to endorse or dispute his view.

“Unbelievable jobs numbers ... these Chicago guys will do anything ... can’t debate so change numbers,” Welch said in the message, posted immediately after the U.S. Labor Department reported that the unemployment rate fell to 7.8 percent last month. That was the lowest since Obama took office in January 2009.

Welch’s background as GE’s chief executive officer for more than 20 years assured his post would attract attention. His message has been resent by Twitter users more than 5,100 times, and he continued the criticism in interviews with the Wall Street Journal and Fox News.

Welch earned the nickname “Neutron Jack” after cutting more than 100,000 jobs at General Electric in the 1980s to help boost profits.

His successor, Jeffrey Immelt, was chosen by the White House in January 2011 to lead a panel of CEOs, labor leaders and academics charged with recommending ways to boost U.S. employment.

Bloomberg LP, the parent of Bloomberg News, competes with Thomson Reuters and units of Dow Jones parent News Corp. in providing financial news and information.