The PSOE has set the shape of its alliance for the Senate, and the deal places the Frente Amplio in second positions on the lists. Under the arrangement, every province the coalition wins will send one seat to each of the two partners. Neither party will sweep a province it carries together. For the Frente Amplio, running second guarantees representation wherever the joint ticket comes first. For the Socialists, sharing the wins is the price of drawing votes from a partner they need elsewhere. Both sides call the pact historic, since the two had never split provincial Senate candidacies in this way. Whether the balance holds through the campaign is the next question for both leaderships.