BS, grassroots activists who double as party insiders are in reality party insiders pretending to be grassroots activists.
I agree with Kenny, it’s hard to be both.
Although many may begin as grassroots activists, they eventually cross the line and morph into something else.
That's your definition. I'm trying to help you with Cruz's definition.
Briefly aside, the phrase "mathematically eliminated" does not have an agreed definition. Cruz supporters say that "mathematically eliminated" means "not nominated at the convention." Most people take the term "mathematically eliminated" as meaning unable to secure a majority of votes on the first ballot, a condition that appears during the primary race.
So, you should not expect that any phrase used by Cruz means what you think it means. You have to dig deeper to figure out what his definition is. I'm not saying your definition is invalid, only that your definition could well be rejected by "your opponent in argument."
Speaking to the heart of the GOP establishment, Cruz rejected the notion that he was trying to appeal to the very "Washington cartel" he has railed against for years."The people who are here are elected grassroots activists from the states," Cruz said of the 168 members of the Republican National Committee in a press conference.
Ted Cruz Seeks to Mend Fences With Republican Elites - TIME - April 20, 2016
"I cannot help that the Donald Trump campaign doesn't seem capable of running a lemonade stand," Cruz told Hannity. "Elections are won by voters and grassroots activists showing up and voting for the candidate they support, and we are winning election after election after election. And nobody, as I travel the country, nobody is asking me this other than the Trumpsters and people repeating it."
Cruz clashes with Hannity: Not my fault if Trump's campaign can't "run a lemonade stand" - RawStory - 19 Apr 2016
Notable in that is that Cruz lists "voters" and "grassroots activists" as if they are separate (but can be intersecting) groups.