Senate Democrats’ political machine has spent more than $15 million to help more moderate Senate candidates defeat progressive primary challengers in the 2020 election cycle.

With the help of the party, its major donors, and the Senate Majority PAC (SMP) — a super PAC funded by labor unions, corporate interests, and Wall Street billionaires — candidates endorsed by Senate minority leader Chuck Schumer’s Democratic Senatorial Campaign Committee (DSCC) have won contested primaries in four battleground states.

While the DSCC’s chair, Nevada senator Catherine Cortez Masto, said last year that the party would support progressive incumbent Massachusetts senator Ed Markey if he faced a primary challenger, he hasn’t seen any outside help yet from the DSCC or SMP in his tough battle with Rep. Joe Kennedy III.