EXCLUSIVE: Trump-backed challenger gains labor union support in key race for House control

EXCLUSIVE: A Republican challenging a vulnerable Democratic incumbent in one of the nation's most competitive House races is touting a key labor endorsement. 

Mike LiPetri, a former state assembly member backed by President Donald Trump, said support from the International Union of Operating Engineers Local 138 reflects growing momentum behind his campaign. 

"I think you'll see [more unions] fall in line with us knowing that we stand with the men and women who work hard to build our...