8:21 AM PT -- Ted Cruz told TMZ Sports on Monday morning he had absolutely no hard feelings toward Yankees fans over the reception.
"It was an awesome game -- it was spectacular," he said. "And I appreciated the great New York hospitality."
Baseball fans were all over Ted Cruz during Sunday night's playoff game at Yankee Stadium ... booing the senator relentlessly and flipping him off as he moved around his seat behind home plate.
The Texas politician -- a huge Astros fan -- showed up to the Bronx wearing orange and blue to cheer on his favorite team as it tried to punch its ticket to the World Series with a win over the Yankees.
Cruz was seen smiling before the opening pitch ... but throughout the night, he was NOT received well by fans near him.
Video of the senator shows as he got up from his seat during the game, fans jeered him over and over again. Several could be heard in the footage calling him a "f***ing loser" and a "racist piece of s***."
A photo of Cruz at the game also shows two fans even flipped him the bird from just feet away.