Anderson is editor of "Leveraging" and ran for the 2016 Democratic nomination in Maryland's 8th Congressional District.

With the House impeachment inquiry officially launched, no one can predict how this will affect the race for president, especially the Democratic primary. Because the inquiry concerns allegedly impeachable acts by President Trump to pressure Ukrainian President Volodymyr Zelensky to investigate behavior by Joe Biden when he was vice president, Biden's candidacy is now being discussed from every possible angle.

With so much attention on Biden, it is notable that the concept of centrism has received so little analysis. The pundits tell us Biden is a centrist and that Elizabeth Warren, for example, is a progressive; likewise, Amy Klobuchar is a centrist and Bernie Sanders is a progressive. And so on. Indeed, the campaign to date is regarded as a standard battle within the Democratic Party between its moderate-centrist and progressive-leftist wings.

But there are many problems with the way the internal battle has been conceptualized.