Social Security
A regular exercise that Democrats engage in every four years is to claim that Republicans are going to end Medicare and/or Social Security. This was a big item during the 2000 election campaign of Bush vs Gore. The Bush campaign was talking about privatizing some aspects of Social Security. There never was any intent to end or even reduce Social Security. None of these claims of ending Social Security were true. The Democrats were just trying to scare older citizens into voting Democratic.
In every presidential election cycle since then, the Democrats have hammered at this theme even though absolutely nothing about the Republican platforms have suggested taking away or reducing Social Security and/or Medicare benefits.