The new Washington Post poll shows Virginia’s Senate race tied, and the national parties apparently already got that memo.

Former Virginia governor Tim Kaine, left, and former senator George Allen. (Steve Helber/AP)

The Democratic Senatorial Campaign Committee has reserved $7.4 million worth of advertising time in Virginia for the probable fall campaign between former governors Tim Kaine (D) and George Allen (R), The Fix notes today, more than half of a $14.1 million buy that also included Missouri and Montana.

That move follows the National Republican Senatorial Committee’s decision last month to reserve $5.5 million in Virginia airtime, meaning that both party committees have now pledged more money to Virginia than any other state.

The twin moves reflect both that the race is close and that Virginia is an expensive place to advertise, particularly the Washington media market. And the committees don’t necessarily have to follow through on these commitments. They could end up putting less — or more — cash into the Kaine-Allen contest as circumstances warrant.