Speaking to reporters outside the White House’s South Lawn, the US President fired back at Swift’s political comments, noting the singer “doesn’t know anything” about the Republican she attacked on Sunday.
The American firebrand told reporters Ms Blackburn “is doing a very good job in Tennessee” and that “she is a tremendous woman”.
He added: “I’m sure Taylor Swift has nothing, or doesn’t know anything about her.
“And let’s say that I like her music 25 percent less now, okay?”
Ever since Trump was elected President, the chart-topping pop star has never shared her political views and has been heavily criticised for not doing so.
In 2017, Marie Claire magazine criticised the singer for not preaching politics, writing on Twitter: “We’re still waiting for an explanation of Taylor Swift’s decision to remain apolitical during the 2016 election.
“Fall of 2016 saw a slew of celebrities get vocally and visibly involved in the political process, supporting candidates and encouraging their fans to get out and vote.
“Taylor is not required to be open about her politics, of course, but it’s also fair to question her decision to remain silent in what was a particularly contentious and consequential presidential battle.”
But in an Instagram post on Sunday, Swift broke years of silence and openly attacked the Republican Senate candidate Ms Blackburn and backed two Democrats from Tennessee – Mr Bredesen for the Senate and Jim Cooper for the House of Representatives.
She wrote: “Running for Senate in the state of Tennessee is a woman named Marsha Blackburn.
“As much as I have in the past and would like to continue voting for women in office, I cannot support Marsha Blackburn.
“Her voting record in Congress appalls and terrifies me.
“She voted against equal pay for women. She voted against the re-authorisation of the Violence Against Women Act, which attempts to protect women from domestic violence, stalking, and date rape.
“She believes businesses have a right to refuse service to gay couples. She also believes they should not have the right to marry.
“These are not my Tennessee values.
“I will be voting for Phil Bredesen for Senate and Jim Cooper for House of Representatives.”
The US President appears to have not taken the Instagram post kindly, especially considering his long-term support for the pop star.
In 2012, he tweeted: “Glad to hear that Taylor Swift will be co-hosting the Grammy nominations special.
“Taylor is terrific!”
A video showing Mr Trump behind the wheel of his Rolls-Royce while listening to Taylor Swift also recently resurfaced, years after it was filmed in 2014.