"Politics ain't beanbag" and everything a candidate did or was attached to gets the spotlight via opposition research. Witness this 1995 story as cited by Crains.

DETROIT — The Obama campaign continued its assault on Mitt Romney's record at Bain Capital on Wednesday, as it said the investment firm that Romney founded was responsible for laying off nearly 1,000 employees at a now-defunct Michigan auto supplier.

Bain bought 39 percent of Madison Heights-based Cambridge Industries Inc. in 1995. Within two years, the investment firm owned a majority stake in the Cambridge. By 2000, Cambridge suffered financial trouble stemming from an overeager acquisition strategy, growing debt and years of earnings shortfalls.

That year Bain took Cambridge into Chapter 11 bankruptcy and sold the company to Dearborn-based Meridian Automotive Systems, which slashed more than 1,000 jobs, according to news reports . In its bankruptcy filing, Cambridge listed debt worth $459.7 million. In 2009, Meridian filed for bankruptcy and liquidated its assets.
It's a bit like my saying for these time, "Everything you write on the internet is forever."