Campaigning for election to provincial or state office frequently requires that a candidate spend much time and energy catering to the interests of national party officials who can help the candidate to win office.
Conclusion (thus)
The elected officials who campaign for reelection while they are in office often fail to serve the interests of their local constituencies.
Evidence
Campaigning for election requires that a candidate spend much time and energy catering to the interests of national party officials who can help the candidate to win office.
Evaluate
The conclusion here has a couple New Concepts: campaigning for reelection / failing to serve interests of local constituencies.
What do we know about elected officials campaigning for reelection while they are in office? We don't know anything specifically, but in virtue of the fact that they are campaigning for an election, we know they have to spend a lot of time and energy catering to the interests of national party officials.
Whether you're trying to get elected initially or reelected, that first sentence applies to you.
So if we do a little algebraic substitution, the conclusion is saying:
People who have to spend a lot of time and energy catering to the interests of national party officials often fail to serve the interests of their local constituencies.
The argument never defines any premise about what local constituencies need, what kind of stuff does / doesn't serve their interests. So there is a big Missing Link here.
Goal
Look for an answer making this sort of connection: .
However, the conclusion is only saying you'd often be failing to serve your locals' interests, so conditional strength would probably be too strong.