Michele Bachmann briefly left the witness protection program to appear on TV for Trump last night. She'll help be a yuge help in MN & IA. Brewer & Arapaio will blanket AZ and additionally gift wrap CO, NV, and NM. Brown and Biden will tag team PA, OH, and MI while Kasich, Portman, Ryan, Walker, and Johnson won't be seen with Trump in their states. Trump's hoping for a mass shitstorm of riots in Cleveland. Will have to spend way more time and resources than McCain or Mitt in IN, NC, MO, AZ, GA, and UT. Also will have less money and weaker national and swing state organizations than they had. Trump's not just hurting for surrogates, he also doesn't have anyone remotely close to Obama or Bubba as fundraisers.
Bill & Hillary split up CA with Bubba in SoCal and HRC in NorCal (mostly fundraising). Trump's terrified of Bubba mocking him on the stump, so he wants to bring up all the Clinton baggage. Best case scenario for Trump is that Bubba predominantly fundraises, although they'll also selectively use him in FL, VA, NC, and NH in the Fall.
Obama will also primarily fundraise, but he'll be a Fall closer to rev up voters in Philly, Pittsburgh, Cleveland, Detroit, Milwaukee, Denver, and Las Vegas. Relishes giving Trump shit and wants to take a final victory lap, but also has to keep donor relationships warm for his library. Will fundraise a lot in CA, NYC, and Chicago.
Warren & Sanders will blanket college campuses, but also be used in WA, OR, IA, MN, WI, NH, MA, RI, VT, and ME. The Clintons can use BFF Howard Dean in those states too just for yucks.
With two minority females and no 'Pubs on the Senate ballot in CA, Dems only need to fundraise in CA, but could use Obama and Bubba for GOTV events in LA and SF. Also could use Biden in SD and Orange County, Bernie and Warren in Oakland and Sac, and Castro or Perez in San Jose, Inland Empire, and the Central Valley. Depends if they want to use CA to pad national popular vote totals or allocate those resources elsewhere.
Dems aren't worried about getting to 270 EVs. Bigger questions are do they want to run up the popular vote margin by padding the score in CA, NY, or IL, spend more resources than necessary in states with vulnerable GOP Senators, or give 'Pubs a chilling look at coming attractions by taking serious runs at AZ and GA or selectively going after significant popular vote pockets in TX. Anything above 52 Dems in the Senate would be gravy. Not Dems' fault that GOP base didn't care/want to change after 2012. Only cost them three more SC Justices and the Latino vote for the foreseeable future, but maybe true believers will finally win the definitive final battles on immigration reform, abortion, gun control, and LGBT rights in 2020 or 2024 at the very latest.
Kaine would be a safe, boring governing pick, but Castro would be a much stronger electoral and bid for the future pick. Franken or Perez would split the difference.