WebsterMark wrote on 12/06/16 at 06:34:59:

 What would have changed if Congressional districts were awarded electors? So, would it have changed the outcome? As you say, Trump would have actually won delegates in California, but he would have lost delegates from Wisconsin, Pennsylvania, my state of Missouri etc...

Yes,  Changing, State  Rights, to a  Electoral Collage system like  Maine & NE, Would have changed, the EC   Votes, in this election.
Which would have gained and lost some in certain States, for each party.
However, Trump, overall, would have gotten  MORE, EC  Votes.

Someone has probably already calculated electors by Congressional districts, but has anyone seen it?

Have Not see any.  Don't know of any. But wow, would that be, Eye  Opening !
(And it would be very interesting to see, how that would have applied to past  POTUS elections)

Also, if that were the law of the land, what would the unintended consequences be? How would the parties try to scam the system?

It would remove the,  ’Safe’,  ’Swing’,  ‘Fly Over’, State  Status.
And it would give  voice, to the People who  Live in  5   Districts in MN.  
Not to just 3.  (And MOST, Other  States as well!)
And, I believe, it would  Greatly  Alleviate, the  Massive,  ‘Voter  Fraud’, issue.  

I  am just going to use  Minn.
 Minn has  voted  Dem for the  19 times out of  22. starting in 1932.
    (52 -54  Ike, and 72  Nixon)
Because I am familiar, with how well they,  ‘HIDE’,  information on their State web site.
And know where the 8, Congressional Districts are.
(Someone else, will have to do  Calf, and their 53 Districts,
but just guessing it would have been, 35-20   (+/-)

This year, the EC  Vote in MN, would have been,  5-5, NOT   10-0.
The 3  districts, which Voted for, C,
were,  Mpls/St Paul, (Twin Cities), Rochester,  Duluth.
All,  very  Densely packed   Metro  Areas.

Without going into sheets and sheets of  numbers.
The overview:
 State   Total:  1,367,717 C    /   1,322,951 T  (C  by 44,765)
(8 Other Candidate votes were, 254,152)

 In  just  3,  (METRO  Districts)   Clinton  won.
 In the 5, Out  State Districts  Trump won.  
     ( But NONE, of those 5  Districts  Votes   Counted !)

What a, ’split’ would do.
I believe, it would  Greatly  Alleviate, the  Massive,  ‘Voter  Fraud’, issue.
(Which is  HOW,  Franken  won)

https://www.washingtonpost.com/news/monkey-cage/wp/2014/10/24/could-non-citiz...
...Al Franken ’s 312-vote win in the 2008 Minnesota U.S. Senate race as one likely tipped by non-citizen voting. As a senator, Franken cast the 60th vote needed to make Obamacare law. ...