Live updates: Trump and Harris continue campaigning in battleground states following the former president’s McDonalds visit

National Democrats made their first advertising buy for the New Mexico Senate race on Monday, sending money to the defense of another member while already under pressure to compete on a challenging map.

According to AdImpact data, the Democratic Senatorial Campaign Committee bought about $96,000 worth of ad time in New Mexico beginning tomorrow and running through the end of the month, in a joint ad buy supporting incumbent Sen. Martin Heinrich.

More about the race: Heinrich is seeking a third term in traditionally blue New Mexico, but he’s facing a Republican challenger, Nella Domenici, with deep roots in the state, as the daughter of the longtime former New Mexico GOP Senator Pete Domenici.

To date, the New Mexico race has seen very little activity from outside groups, and while the DSCC’s ad buy could be a precautionary defensive move, it could also reflect growing concern among Democrats about a potentially expanding map.

How Republicans compare: The group’s GOP counterpart, the National Republican Senate Committee, has spent about $1.4 million on the race in a joint ad buy with Domenici, and began running ads in in August; the NRSC had its largest bookings the week of October 8, when it ran about $347,000 worth of advertising, up with ads slamming Heinrich’s record on immigration and crime.

Since the start of 2024, and including bookings through Election Day, Democrats have outspent Republicans on advertising for the New Mexico Senate race by a total of $7.3 million to $6.2 million; the candidates account for most of the advertising, Heinrich’s campaign spending about $5.9 million, Domenici’s campaign spending about $4.6 million, not including its joint ad buy with the NRSC.