Donald Trump throws Republican principles: Adam Kinzinger

Washington:Republican Congressman Adam Kinzinger said on Wednesday that he doesn't see how he can endorse his party's nominee for the White House, Donald Trump, in the wake of the week's events.

"I'm an American before I'm a Republican," he told CNN's Wolf Blitzer on "The Situation Room".

"I'm saying for me personally, how can I support that? Because he's crossed so many red lines that a commander in chief or a candidate for commander in chief should never cross."

Kinzinger, who has openly hesitated to embrace Trump as his party's standard-bearer, said he went to Cleveland hoping to "at least mildly endorse the Republican front-runner."

But in the aftermath of Trump's comments about Russian President Vladimir Putin and the parents of fallen Muslim American soldier Capt. Humayun Khan, the third-term Illinois congressman said that he doesn't "see how I get there anymore".

"I'm a Republican because I believe that Republicanism is the best way to defend the United States of America," Kinzinger said, adding that Trump "throws all of these Republican principles on their head."

But Kinzinger said he would not support Democratic nominee Hillary Clinton and was contemplating writing in a candidate on his ballot come November 8, CNN reported.

The second high-profile stand against Trump comes a day after Richard Hanna, a Republican congressman from New York who is retiring after this term, announced on Tuesday he would vote for Clinton in November.