That is one, very limited way of looking at it.
1. State interests would presumably mean manufacturing interests - but many Canadian drugs imported to the US are made in the US. They are cheaper in Canada due to govt regulations. So manufacturing will not be significantly affected.
2. There are 2 categories in opensecrets.org - pharma/health products, and pharma manufacturing. (Don't ask me the difference). Clicking on pharma manufacturing reveals a very different story. It is also really disingenious to use all cycles to compare Booker with, for example, Obama. Obama has stood for senator once and president twice, raising HUGE money. Booker has stood for senator once. His total needs to be normalised for that.
Booker stood for senate in 2014. THe picture changes drastically when you look at that:
https://www.opensecrets.org/industr...00&recipdetail=A&sortorder=U&mem=Y&cycle=2014
Top of the list in manufacturing, 2nd in pharma/health products in the cycle when he stood.
So, the whole non-correlation is built on misleading reporting.
3. This amendment was revenue neutral, it would not increase the deficit. It posed no safety risks since Candian and US FDA norms are similar (that is his current defence right now). It posed no significant threat to jobs since many Candian drugs are manufactured in the US. In fact, in the unlikely scenario where Canadian drugs not from the US began to drive US drugs out of the market, the US-manufactured versions would simply lower their price (like they do in Canada).
It shows a clear correlation between campaign contributions and votes - Dems in Washington, Dems in NJ, and the split between McConell and Rand Paul (both Republicans in Kentucky, McConell is top of all lists while Paul isn't in top 20 for any cycle).
tl;dr: Vox is a rag.