Rep. Roscoe G. Bartlett, the Republican incumbent fighting to keep his seat in Maryland's 6th District, fired what could be considered the first line of attack against his Democratic opponent in the general election race, criticizing John Delaney in a tweet.
But hours later, the Bartlett campaign deleted the Twitter post without explanation.
On Monday evening, Bartlett's campaign retweeted a comment about Delaney's stances on energy. The item stated that Maryland "gets 51% [of its] energy from coal." Delaney, a Potomac banker, "wants a [carbon tax] that hurts the poor. No to natural gas, no to Keystone," the tweet read in reference to the controversial oil pipeline.