7024.1	Assessment
Research Question (Clear, unambiguous)	"Does a politician’s social media presence and activity have an effect on the public’s opinion of them? If so, what types of social media activity elicit negative versus positive changes in public opinion?"  This sounds interesting, but it also appears rather broad and vague.  Social media have multiple forms, "presence" isn't meaningful without considerable specification, what is negative may be debatable, and presumably it is the attention paid a politician rather the amount she or he contributes that is influential.
Relevant Literature	Plan is okay.
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible)	These causal suggestions seem too vague to be useful.  Essentially, people may diffuse messages via social media responding to a politician's statements or portrayals on social media (or elsewhere).  The responses may be supporting or opposing the politician, presumably depending on political agreement or disagreement, on the controversiality of the relevant conversations and the public visibility of the politician or the issue.  This needs broader and better consideration of causality to capture this range.
Data (variables, sample, comparison)	It will take a broader range of data than in mentioned here.  You would need to capture the range of a politician's social media activities, compared to those of comparable politicians and others, and data on the range of responses on social media, including the content, dispersion, frequency, and timing of the responses.  Without such a range of data, which must be complete or represent a proper sampling, it will not be possible to produce empirically defensible analyses.    Note one key data issue.  The efforts of a politician to put content on social media need not appear under the politician's name (and, of course, that appearing under the politician's name need not be produced by the politician).
Research Value	If it is possible to do well, then research on the social media's potential  influence on political positions and allegiances would be important.  Unfortunately, doing it well would be a challenge.
Overall	An interesting topic, but so far the description does not suggest a good or even plausible plan.