The Congressional Leadership Fund, the main Republican super PAC focused on House races, is expanding its fall advertising campaign across competitive congressional districts as both parties prepare for the November 3 midterm elections. The group has reserved advertising in 15 districts while working with a $175 million budget.

Rather than using one national message, CLF is tailoring its advertisements to individual Democratic challengers and the dynamics of each district. The strategy is designed to introduce Democratic candidates to voters while defining them through issues and characterizations developed specifically for their races.

One example is Arizona's 6th Congressional District, where Democratic candidate JoAnna Mendoza is challenging Republican Rep. Juan Ciscomani. A CLF advertisement repeatedly uses Mendoza's name during its 30-second spot, describing her as an “extreme liberal lobbyist” and arguing that she would not represent voters' interests. The group has reserved approximately $2.9 million in advertising for the district, according to AdImpact.

The Democratic House Majority PAC is taking a different approach. The organization has launched advertising in 11 districts, with many of its spots focusing on Republican incumbents' support for President Donald Trump's agenda and arguing that voters are facing higher costs as a result. House Majority PAC confirmed that its latest advertising is running across 11 districts in states including Arizona, California, Colorado, Iowa, Michigan, Nebraska, Ohio, Pennsylvania, Virginia and Washington.

In Colorado's 8th Congressional District, for example, a House Majority PAC advertisement targeting Republican Rep. Gabe Evans focuses on health insurance premiums. The ad features a woman describing receiving notice that her premiums were increasing and attributes the increase to Evans' vote for Trump's tax legislation. The buy is valued at approximately $6.4 million, according to AdImpact.

The spending patterns also show where each party is concentrating its resources. Of CLF's 15 targeted races, nine involve defending Republican-held seats, five target Democratic incumbents, and one involves Nebraska's open seat following Rep. Don Bacon's decision not to seek reelection. House Majority PAC's initial 11-race lineup is more heavily focused on Republican-held seats, with seven advertisements targeting Republicans, two defending Democratic incumbents, and two involving open seats.

The competing strategies reflect different approaches to the House campaign. While Trump has made himself a central figure in the Republican effort, CLF's advertising is largely focused on individual candidates and local races. Democrats, meanwhile, are frequently tying Republican incumbents directly to Trump and his administration.

With control of the House potentially determined by a relatively small number of competitive districts, both parties are increasing their advertising efforts as Election Day approaches. Reuters identified roughly 50 House races as potentially competitive, with several expected to play a significant role in determining control of the chamber.