The farmers’ party BBB (Boer Burger Beweging) will get 17 seats in the Senate, making it by far the largest.

That brings the coalition of VVD (10), D66 (5), CDA (5), and ChristenUnie (2) to 22 seats, ten fewer than the government parties now have.

The Senate has 75 seats, so 38 are needed for a majority. The Rutte IV coalition already didn’t have that majority, but it will now have to gather more support from the opposition to get policy through the Eerste Kamer.

The new members of the Provincial Councils and electoral colleges will elect the senators at the end of May. The Council members aren’t obliged to vote for a candidate from their own party, but that usually happens.

https://nltimes.nl/2023/03/20/bbb-17-seats-senate-coalition-22