I am not worried about SS being taken away. I believe there is virtually zero threat of that with any administration as the fallout would be too huge - political suicide, regardless of party.
However, we did accelerate DH's SS. We don't really need the cash flow at this time, but he has been having some pretty serious health issues. He will be 67 in March. So far, he's fine, but we realized his life expectancy may not be what we had hoped so we started it. It only took about 3 days from the time he applied online until the first payment was in our account.
We are going to delay mine, likely until age 70, TBD based on many other factors. I'll be 65 later this year.