The Trouble with the Curve director was accused of rambling by some in the media during his endorsement of Mitt Romney, where he debated an empty chair standing in for Barack Obama.
Jon Stewart and Star Jones were two of the many pundits to openly mock Eastwood's performance at the Tampa convention.
Eastwood discussed the speech with Access Hollywood, revealing that bringing the now-infamous empty chair on the stage was a spur of the moment decision.
"That was just a whim [of] the moment, I had no idea," he admitted. "You have one thought and then you walk out there and then 10,000 people are yelling at you, and you go, 'OK, all of the above is gone'."
The Oscar winner also said that he was ultimately happy with how his remarks were received.
"It was a good reaction because it antagonised some people... and other people liked it," he explained.
"You're not trying to compliment somebody else that has an opposing point of view and you're not necessarily trying to cater to anyone else... you don't have to kiss it up with politicians, they're working for you. That's their job."
Eastwood has long been involved in politics. He served as mayor of Carmel-by-the-Sea, CA in the 1980s.
His baseball drama Trouble with the Curve - which stars Amy Adams and Justin Timberlake – opens on Friday in the US and on November 30 in the UK.
Watch a trailer for the film below: