Highlighting the difference between his last White House bid in 2012 and his son's run in 2016, the elder Paul noted that conditions change with every election. Ron Paul suspended active campaigning in May 2012, while Rand Paul suspended his effort just two days after the Feb. 1 Iowa caucuses, the first nominating contest of the Republican primary.
"The demagogues are out there," Ron Paul said, presumably alluding to Trump in response to a caller's question during his appearance on C-SPAN. "The anger over ISIS makes a difference. People get more concerned. But I don't think the freedom movement got as much coverage. I can't explain exactly why."
Rand Paul struggled to gain traction in a crowded Republican field that was dominated by Trump. His non-interventionist policies, coupled with terror attacks in Paris and San Bernardino, California, late last year likely also contributed to his campaign's demise.