Center Forward, a dark money group funded by the drug industry and led by pharmaceutical lobbyists, has been running ads touting Democratic senator Kyrsten Sinema in Arizona for five months — ever since she started working to undermine Democrats’ plan to allow Medicare to negotiate lower prescription drug prices.

Sinema’s demolition campaign came despite polling showing that 94 percent of Arizonans support the idea of Medicare negotiating drug prices. A 2017 survey found that more than a quarter of residents in her state had stopped taking prescribed medication because of the cost.

Amid that crisis, Arizonans earlier this month started seeing a new TV ad from Center Forward saying that “Arizonans are tough and independent, just like Kyrsten Sinema.” Center Forward’s previous ads contained similar drivel about independence and bipartisanship — but this latest ad does something special: it screams the quiet part out loud about who Sinema actually works for.