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 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 what he saw as a need to put “country over party” and saying he was “standing firm in defense of democracy.”
Mr. Kinzinger is the highest-profile Republican official formally backing President Biden, whose campaign earlier in the month tapped Mr. Kinzinger’s former chief of staff Austin Weatherford to serve as its national Republican outreach director. Former Georgia Lt. Gov. Geoff Duncan, a Republican, also endorsed President Biden in May….