Casey Michael brings up the 1984 incident against Reagan, but an overwhelming majority of people who have no idea about 1980.
The long and short of it was the Reagan campaign and RNC affiliates were engaged in backchannel communications with Iranian reps to broker the delay and staging the timed release of the hostages.
The delay in order to maximize their attacks on Carter on a very public and front and center issue that the entire country was keenly focused on in the run-up to the election.
Then, they timed the release of the hostages 1-2 in lockstep almost immediately after the inauguration (literally the day after!) to boost Ronnie's popularity numbers in order to swing national sentiment and create a groundswell of support for his impending deregulation of America, absurd tax cuts, bloated defense budget, and exploding the deficit- while simultaneously raiding the Social Security and Medicare trust reserves through the backdoor to use as their own personal piggy bank slush fund.
Don Regan, at the encouragement of Greenspan, who is one of the most disastrous people in American history, hatched this plan to rob the social safety net money (and coincidentally create the argument that these programs had to be cut, or ended if they had their choice). Using this money, they essentially stole, which was done to make the budget numbers look prettier- or at least not as ugly so economists wouldn't be so quick to raise the red flags & sound the alarm bells about the con job that is supply-side "trickle down" economics.
Even still, the numbers were still so horrendous that if remember, Reagan had to raise taxes and adjust the original tax cuts.
People need to wake up and realize that the Trump is not any different from what the GOP has been doing since Nixon- he's just an uglier and dumber figurehead for the Republican party, but lines up with the GOP vision of America 99% across the board.