It's in the article: ..... The documents released Tuesday also reflect the Clinton White House's interest in Trump's flirtation back in 1999 and 2000 with a third-party presidential run. One internal White House email in early 2000 among staff notes that Trump "has his eye on the big JOB." Another from November 1999 forwards an Associated Press article detailing then-potential candidate Trump's proposal for a one-time 14.25 percent tax on the net worth of wealthy Americans. ..... < snip > ..... FoxNews.com has asked the Cruz and Trump campaigns for comment on the Clinton documents. Neither campaign has yet weighed in. ..... < snip > The National Archives said they had reviewed a batch of several FOIA requests, for which they planned to release more than 9,000 pages. Regarding the Trump files request, the record-keepers said just three pages would be restricted. The FOIA request itself came from BuzzFeed ..... < snip >
Little more on Trumps-Clintons ties and Trumps-Democrats ties (including Ivanka and their extended family, Kushners) : The son-in-law also rises: For Jared Kushner, championing Trump marks break with Democratic past - Kushner Cos. CEO was an active donor to liberal politicians in NJ, NY - FR, posts #75, #81, 2015 April 07
So, Little doubt about Trump being a big-tax / big-tariffs / big-government authoritarian Democrat / third-party (which can be hijacked with little money and effort, especially for rich celebrity) guy...
And his constant since the beginning of campaign threats that if he is not "treated fairly" (which could mean anything at any given time, and provide an out for Trump if/when things don't go his way) he could go third party (supposedly damaging Republican chances, particularly down-ticket) that he keeps trying to use as a leverage over Republican primary voters, show that he is in it only for his ego, his brand, and has very tenuous relationship with conservative or Tea Party movement, but will say anything he thinks "we" want to hear to get the nomination :
Trump: The Two-Party Political System Is 100% Rigged, "It's A Crooked Deal," - FR / RCP, by Tim Hains, 2016 April 11
It’s seldom mentioned that Trump offered to run as the vice-presidential candidate for GHW Bush in 1988.