I'm looking for a verb whose meaning is approximately "use as a starting point for, opportunistically" or "use as a pretext for". For example,
She's using her safety presentation to [ ] her campaign to increase employee wages.
Meaning: She's exploiting her presentation to launch her campaign.
My friend loves [ ] mall expeditions (onto/on) grocery shopping trips.
Meaning: My friend loves to opportunistically turn grocery shopping trips into mall expeditions.
I used to think the word "bootstrap" ("bootstrapping") served this purpose, but have since come to learn that it refers more to autonomy than opportunism.
I also considered "piggyback" ("piggybacking"), but this carries the strong connotation of attaching something minor to something major, which isn't the case for the desired verb.
"Segue into" was a third candidate, although it refers more to transitioning than to starting something new.
Finally, I considered "kickstart" ("kickstarting"), but this doesn't always imply opportunism, and furthermore sounds awkward in many situations (e.g. "kickstart my complaint", "kickstart his request for tax returns").
I'm not certain if a verb with this precise meaning exists in the English language, although I can't shake the feeling that one does.