He is also appearing in the districts of vulnerable Democrats and promising to "terminate" those who stand in his way.
Lampson was considered the most vulnerable Democrat in the House due to the district's heavy Republican tilt.
Mr. Nelson, who narrowly won election in 2000, was once considered one of the nation's most vulnerable Democrats.
And ever since, Republican strategists have regarded her as one of the most vulnerable Democrats in the Senate.
Ms. Moseley-Braun, for example, was seen as one of the most vulnerable Democrats in the nation.
Forbes is the most vulnerable Democrat in the House.
Mr. Lautenberg has an early lead, but he is believed to be one of the most vulnerable Democrats.
The apparent authorship derived from the fact that the memo was stapled to the separate memorandum about vulnerable Democrats.
Republicans have since put him at the top of their list of vulnerable Democrats, investing money and time in efforts to unseat him.
The Popular Front, with some outside technical support, had identified the most vulnerable Conservative Democrats and targeted them.