ATLANTA—Former Rep. Adam Kinzinger (R-Ill.) crossed party lines on June 26 and said he was proud to endorse President Joe Biden and would “do whatever is necessary” to ensure that the president defeats former President Donald Trump in November.
Mr. Kinzinger announced his decision at the Georgia State Capitol the day before the first of several presidential debates, citing on X, formerly known as Twitter, what he saw as a need to put “country over party” and saying that he was “standing firm in defense of democracy.”