Democratic strategist James Carville said on Tuesday that his biggest concern for Vice President Kamala Harris’ campaign is that she can’t effectively explain why she was so liberal in 2019. Harris supported many left-wing policies during her 2020 campaign, which she launched in January 2019, including a fracking ban, mandatory federal gun buybacks and the elimination of private health insurance. Carville, on “THE DAILY BLAST with Greg Sargent” podcast, said “she has an ineffective answer for 2019” when asked about the “nightmare scenario” for Harris’ campaign. Read: Florida Sheriff Is “Sick A…