I've made some updates to the 2018 House of Representatives campaign on the Campaigns page.
1. Updated incumbents
Added special election winners
Updated committee chairs
Input some newly-declared challengers
2. MAGA Party
Challenging moderate/liberal Republicans
On ballot in districts where...
Trump carried by 20+ points and either Democrat incumbent or GOP under 80% by Heritage Scorecard
3. "TBD" in districts where GOP/Dem has targeted but no formal declared candidates. Non-targeted districts are "off ballot" if no one has declared.
4. If DCCC or RNCC has a district in a "frontline program" for extra support (source ballotpedia), I raised Candidate Strength by 1
5. Region percentages:
GOP% = 50 + Cook PVI + Cook Prediction *
*Cook Prediction:
Likely GOP +8
Lean GOP +5
Tossup GOP +1
Tossup Dem -1
Lean Dem -5
Likely Dem -8