3rd Party.  I believe things are shaping up for one.
(in 4 years from now)
Lots of factors, to be determined, based on performance.
Right now, perhaps.

If  the DNC  elect  Elision, as their head.
Not all the DNC, but most all, of  the 20-25%ers to the Left.
and all of the, ‘Ultra-Liberals’, (of what ever party).
Are just going to bring it down, Big Time.

Many of the known  RNC heads who have said the  POTUS,
 (who ran under the RNC because it was a way of winning),
is, ’not’, one of them.
And if those, leave and keep obstructing.
It will remove, the  Rep’s power.

Those people, who Voted  For  Trump,
            (The Citizens)
Were,  Dem’s, & Rep’s, & Ind’s, and other 3rd parties.
And are the ones, who, will vote for a,
’New’ 3 party, or take a existing one,  (re-wright the Platform)
And vote for the  current POTUS,  (If he ’Fixes’ things).

This is a possibility.
But  wait, see what happens with the Current  POTUS,  first.

Their will always be, (always has been),  people,  that disagree with a position.  But to disagree with a position, before one even knows what that position is?  
Or to disagree with a position, before one even knows what the, result, will be?

Their will always be, and has always been, people that,  
Applaud and give great  Kudos, to,  ’their party’ elect. and  Condemn the, ‘other’, party, for doing the  SAME  THING.  
Why not see, what  the, ‘other’ party does with the  SAME  THING, you once said was, ‘great’,  before you say now, ‘it’s bad’ ?

Just a ’start’, on ‘who’, can get into a  Debate, at the POTUS  level.
First Their is no law,  and a person, ‘holding’ the Debate, can decide on their own criteria.

One source, Commission on Presidential Debates (the “CPD”), said:
“ …candidates must appear on a sufficient number of state ballots to have a mathematical chance of winning a majority vote in the Electoral College, and have a level of support of at least 15 percent of the national electorate as determined by five selected national public opinion polling organizations, …”

Looks like a State, ultimately decides.  For the Fed  POTUS  election.

Do remember, the State election, when the, ball less,  J. Ventura  ran.
He just yelled and screamed, then he got on the final Debates.
And because he was like Trump,  Just  Stating things,
Not doing  PC   talk, or  kissing  Azzes.  
I believe that is the reason he won.

Unfortunately, turned out,  he could not fight his way out of a wet paper bag.
Unlike Trump, who did more things in 8 days, than Obama did in 8 Years !

So, if a 3rd, is popular,  and the party/candidate, has the support/numbers of the States,
or yells and screams, or  kisses Azzes enough.
I think it could happen.

It may not be necessary, if it is seen that the, ‘lost’  Republications, come back to the fold.
The Democrats, just gona  Whine, and ignore facts, say ‘reality’ is not ‘real’,   and  ‘Parrot’  what they are told to say, without finding out the, Truth, for themselves.

How are we gonna get them all in the debates? I don't like how things are either. We get lifelong criminals offered up, or fresh faces, supported BY lifelong criminals. If someone has Kissinger or Soros or Rockefeller somehow attached to a support group, they are a puppet to the system that got us here. Bryzinski, forgot that creep..

If it swings any further to the right, I suspect the makers of runes will become wealthy.

He certainly is not a republican.