The 27 congressional districts targeted by Obama's group

The Democratic group Organizing For Action (OFA), which grew out of Barack Obama's campaign, is intervening in 27 congressional races this cycle, Politico's Edward Isaac-Dovere reports.

Why it matters: OFA has not gotten involved in House races before. Their involvement, with the help of the National Democratic Redistricting Committee, is another way Democrats are trying to engineer a blue wave.

The targeted districts don't include every GOP-held seat in a Hillary Clinton-won district, but many areas were won by Donald Trump in 2016 that Democrats want to take back.

• AZ-02, CA-04, CA-10, CA-21, CA-25, CA-39, CA-45, CA-48, CA-49, CO-06, IA-01, IL-06, KS-03, MN-02, MN-03, MO-02, NC-09, NC-13, NJ-11, NY-11, PA-01, PA-06, PA-07, TX-07, TX-23, TX-32, WI-01.
• OFA will deploy volunteers on the ground in these districts to help campaign for their preferred candidates.

Be smart: OFA's involvement signals a robust effort to boost progressive candidates around the country, even in districts President Trump won. OFA spokesman Jesse Lehrich tweeted that their volunteer's "battle-tested organizing & training skills will be a huge value-add for progressives in critical races this November."

• Yes, but: That could create intra-party conflict if other groups like the DCCC get involved for different candidates in the same races.