with deep records of service running deep into the map

Irelia20150604

Senior Member
Chinese
Source: Democrat Holds Slim Lead In Pennsylvania District Trump Won By Nearly 20 Points | HuffPost

The Democratic Congressional Campaign Committee claimed victory Tuesday night before a winner had been declared. Ben Ray Luján, the chair of the group, said the results should “terrify Republicans” who spent millions to defeat Lamb.

“We have incredible candidates with deep records of service running deep into the map this year, and it’s clear that these Republican attacks are not going to stick,” he said.
==
Hi everyone! How should I understand the bold part?
 
  • Barque

    Senior Member
    Tamil
    He seems to mean that those candidates have long service records, full of achievements. I'm not sure why he used "deep into the map". It isn't an expression I've heard before.
     
    < Previous | Next >
    Top