The Democratic Senatorial Campaign Committee is spending $425,000 on TV ads to boost Pennsylvania Senate candidate Katie McGinty, according to an official with the committee. That’s a decision that will aid the establishment-backed candidate ahead of her April 26 primary, but one that could draw criticism the party is siphoning valuable resources better used in a general election.

The money will replace the McGinty campaign’s own TV ad reservations statewide starting Tuesday, according to the DSCC official and two sources tracking the ad buy.

The ad buy is not an independent expenditure from the committee, which has endorsed McGinty, but part of a coordinated buy funded by the DSCC’s own campaign account. Because there are limits on how much this type of coordinated money can be spent in a state, spending it in a primary means there will be less available in a general election.

The limit on spending coordinated money in Pennsylvania is $1.9 million, according to one source familiar with coordination rules.

The cash infusion will help McGinty, who has lagged in polls despite an array of endorsements from party leaders, including President Barack Obama and Sen. Bob Casey. Party leaders have backed the former Al Gore adviser because they worry her opponent former Rep. Joe Sestak, who by his own admission likes to do things his own way, will be a weak candidate in the general election.