Trump lost the popular vote to Hillary Clinton but beat her through the electoral college. Mr Parscale revealed he had issues with getting an absentee ballot. According to CNN, he said: “In 2016, I was in New York working to elect Donald Trump and encountered a series of problems receiving my absentee ballot from Texas and missed the deadline.
“Just further proof that vote-by-mail is not the flawless solution Democrats and the media pretend it is.”
Trump beat Mrs Clinton in Texas by nine percentage points.
This would normally entitle him to 38 electoral votes, but he only received 36.
Two faithless electors in Texas failed to vote for Trump.
One of these votes went to then Ohio Governor John Kasich who lost to Trump in the 2016 Republican nomination race.
Another vote went to former Texan Congressman Ron Paul.
Mr Paul was the Libertarian Party nominee in the 1988 election and contested the Republican nomination in 2008 and 2012.
His son, Kentucky Senator Rand Paul contested the 2016 nominations.
READ MORE: Donald Trump ‘didn’t know UK is nuclear power’, new book reveals
In April, he said: “You know why I voted? Because I happened to be in the White House and I won’t be able to go to Florida and vote.”
Back in 2016, Ivanka Trump and Eric Trump were unable to vote in the New York state primary as they did not register in time.
Trump still won the primary comfortably, with more than 34 percentage points over Mr Kasich.
The POTUS won 89 delegates, Mr Kasich won six.
Texas Senator Ted Cruz won 14.53 percent of the vote but this was not enough to gain any delegates.
Mr Cruz would ultimately be the closest challenger to Trump, but only picked around a third of the delegates that the former businessman did.
In the 2020 nomination race, Trump is the presumptive nominee having received over 93 percent of the vote so far.
Former Massachusetts Governor Bill Weld, who was the Libertarian nominee for Vice-President in 2016 has denied Trump 100 percent of the delegates.
Mr Weld won one delegate in Iowa, and polled just over ten percent in Vermont, but has suspended his campaign with just one delegate.