American Crossroads: Founded in March by Rove and Gillespie to counter ad spending from liberal outfits like MoveOn.org and labor unions, this 527 group says it plans to raise and spend upwards of $50 million before November. So far, the group is focusing on 11 key Senate races, including Nevada, where the group has run two ads attacking Senate Majority Leader Harry Reid. But Collegio says American Crossroads will begin targeting House races closer to Election Day. According to Internal Revenue Service records, the group has raised roughly $8.5 million so far — including $1 million from Dallas energy executive Trevor Rees-Jones.

Crossroads GPS: A spinoff of American Crossroads, this 501-c4 group can keep its donor list private — a major selling point for individuals and corporations who want to anonymously influence elections. While it won’t run ads, the group is picking up some of the pricey administrative tasks that the RNC has usually taken on, including building a database that allows them to microtarget voters in certain congressional districts with outreach specific to their interests.

American Action Network: Modeled in part after the liberal Center for American Progress, this 501-c4 group is headed up by former Minnesota Sen. Norm Coleman and managed day-to-day by Rob Collins, a former top aide to House Minority Whip Eric Cantor. Together with its sister group, the American Action Forum (see below), the outfit plans to be something of a GOP think tank, helping to craft the Republican message. But this side of the operation will focus more on advocating candidates than on policy development. A GOP source tells The Upshot the group is looking to spend as much as $25 million to influence the midterms. Already, the group has launched an ad against Charlie Crist, who quit the GOP to run as an independent in Florida’s Senate race. The group has just launched a $450,000 campaign trashing Democrat Paul Hodes in New Hampshire’s Senate race.

American Action Forum: An offshoot of the American Action Network, this group will focus more on formulating policy and helping GOP candidates deliver their message than on running ads attacking specific candidates. Fronted by Doug Holtz-Eakin, a former economic adviser to John McCain’s presidential campaign, AAF lists Coleman and former governors Jeb Bush and Tom Ridge as board members.

Resurgent Republic: Founded by Gillespie and several GOP pollsters last fall, this group aims to be the Republican equivalent of Democracy Corps, a polling and research group founded by Democratic pollster Stan Greenberg and former Clinton operative James Carville. The nonprofit group will try to improve GOP messaging through polling and research groups and will work directly with other Republican groups in the network.

Republican State Leadership Committee: This 527 group plans to spend at least $40 million to influence state elections, including local House and Senate races, ahead of next year’s planned redistricting debate. While Gillespie is the chairman, other advisers on board include former Rep. Tom Reynolds, who used to chair the House GOP campaign committee, and former RNC chair Mike Duncan (who is also working for American Crossroads).

Keep in mind the Center for American Progress was modeled after the Heritage Foundation. There are like a million conservative front groups so it is hard to keep track of them.