The Democratic Congressional Campaign Committee is following up its first major ad buy two weeks ago by reserving another $18 million in television time for their candidates across the country. The new purchase, which brings Democrats' total reservations to $53 million, will target a total of twenty new districts, increasing the playing field to fifty-one seats on both sides of the aisle.

The new purchase, much like the first round, heavily favors spending in Republican-held districts. Seven of the targeted seats are being vacated by Republican members of Congress this year, while another eight are held by GOP members seeking re-election. The five remaining seats are held by Democrats, including Alabama Rep. Bud Cramer's open seat.

Republicans, who trail in cash on hand by a six-to-one margin, took some comfort after the first round of advertising reservations by crowing about some seats left off the list of early targets. Many of those seats are included in the second round, pointing to districts like those in which Democrats have had recent success.

Among those archetypes are seats held by Reps. Dave Reichert, of Washington, and Mark Kirk, of Illinois. Both are suburban districts in which Democratic candidates at other levels, including the presidential, have won. Democrats have reserved $949,000 to target Reichert, whose district encompasses much of suburban Seattle, and $1.4 million to take on Kirk in the pricier Chicago suburbs.

Democrats have also found success in the economically-depressed stretch between the Northeast and the Rust Belt. The party has laid down a combined $2.7 million to target three Republican-held seats in upstate New York, two held by retiring Reps. Tom Reynolds and Jim Walsh and one by incumbent Rep. Randy Kuhl.

But the party has to play defense as well, and the DCCC is starting with two of its three most junior members. Democrats reserved $723,000 to defend Louisiana freshman Don Cazayoux in the first round, and it has now put aside a combined $2.08 million to defend its other two special election winners, Reps. Bill Foster, of Illinois, and Travis Childers, of Mississippi.

Democrats will also spend money defending two freshmen members, Arizona Rep. Gabrielle Giffords, who faces a tough challenge in State Senate President Tim Bee, and California's Jerry McNerney, who is running against highly-touted Republican recruit Dean Andal.

A full list of districts targeted and the amount the DCCC has reserved can be found after the jump.