The link between the two was mentioned during a congressional grilling of Google chief executive Sundar Pichai.
He was asked whether this was an example of political bias in algorithms, something he denied.
According to Google Trends, "idiot" is currently the number one most searched for term in the US.
Democratic congresswoman Zoe Lofgren posed the question about why "idiot" highlighted results that included pictures of the president.
"How would that happen? How does search work so that would occur?" she asked.