The Democratic Senatorial Campaign Committee is making an additional $650,000 purchase of Connecticut advertising time in support of Rep. Christopher Murphy’s (D) open-seat Senate race against former WWE CEO Linda McMahon (R).

The new buy lasts from Oct. 16 through Oct. 22 and will be on broadcast and cable. This builds on the DSCC’s independent expenditure arm’s previous $2.1 million investment in this race, according to a source who tracks Connecticut Senate media buys. Also per this source, the Democratic group Majority PAC has spent $1.1 million.

The ad spending in this race is unlike any other Senate race in the country. Because McMahon is able to self-fund her television advertising to levels that include saturating the expensive New York City media market that covers a significant portion of the Nutmeg State, national Republicans are on the offense here without having to invest a dime.

Democrats have yet to match McMahon on New York broadcast television, although they have been on the air on New York cable. This is among the reasons McMahon has made this contest competitive despite the Democratic lean of the state.