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.
Mr Pichai replied that Google search results were based on billions of keyword ranked according to more than 200 factors, including relevance and popularity.
"So it's not some little man sitting behind the curtain figuring out what we're going to show the user?" responded Ms Lofgren.
Republican members of congress continued to grill Mr Pichai, with Steve Chabot asking why, when he searched for news about his party's health care bill, only negative news appeared.
Mr Pichai replied that equally negative news was highlighted when people used the search term "Google".