It’s not about whether capping some prices is good or bad for the economy. It’s about whether it helps poor people or not, whether its something in-line with Christian principles of helping the poor.
You were asking for actions that back up their words, so I give you actions that show one party is much more in-line with Jesus’ teachings. Where the other one just spits on them while waving an upside-down bible for a photo op.
Worse for everyone? I’m not so sure about that, the stock price of one pharma company is not “everyone”. So you really think capping the price of insulin somehow makes things worse for the poor, who already are struggling to afford it? Not sure how much worse it can get for them, if they can’t afford a drug they need to live. That seems pretty close to dying.