CNN Inside Politics

Can any Republican truly challenge Trump?

First: Republican candidates got busy bruising each other last night in a chaotic debate marked by insults, prepared one-liners and plenty of pettiness. But it offered little clarity about who, if anyone, can beat Donald Trump? 
Plus: Today is day one of the impeachment inquiry into Joe Biden. Republicans promise a show and tell. Democrats ask, where's the evidence? 
And: President Biden is in Arizona to revive a 2020 and 2022 campaign theme that Democrats believe worked: MAGA extremists are a singular threat to American democracy. 
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Each weekday, Dana Bash and a panel of well-sourced reporters bring you the most important political stories of the day. On the weekend, Manu Raju kicks off CNN's Sunday morning political programming with Inside Politics Sunday. Dana and Manu get answers from the people making headlines, explain the political stories that matter, and report on how the news will impact you.