It seems obvious that the term "reform" is overused.
Most major issues facing the US has a "solution" that
includes the term "reform".
banking Reform
education Reform
Campaign finance Reform
Healthcare Reform
Reform reform reform etc
The term has become the elevator music
of political change, but of course "reform" never happens.
As to research, no.
But there are people worth looking at regarding word choice
George Lakoff is all about issue framing.
Is "reform", "renewal", or "re-invention" more inspiring?
Does Frank Luntz use the term "reform"?
Sometimes, but take this example:
NEVER SAY: Tax Reform
INSTEAD SAY: Tax Simplification
The point being, depending on who this group is addressing
using wonky or politically laden terms makes average people glaze over.
Even people who are familiar with "reform"
should be aware with how frequently the term "reform" is applied...
and reflect on how infrequently "reform" actually occurs.
Lastly, not to be offensive, but using words which are so milquetoast
such as reform, caucus, wing, etc is kinda lazy thinking.
The problems on the table require serious, inspired consideration.
There is really little room for thinking "inside the box".
The "Populist-Reform-Party-Caucus-Wing" is not inspired thinking.
Branding of the group should reflect the mindset anticipated
as necessary to address those concerns.
Just some opinion
ON EDIT: "Reform" has a negative connotative resonance.
It puts the brand in the position of trying to "fix" a problem.
Whereas, renewal, re-invention or similar words can have a positive connotation.