CHARLESTON, S.C. (AP) — Democratic presidential hopeful Amy Klobuchar is dedicating $4.2 million to run ads in states that will vote in the March 3 Super Tuesday contests, the clearest sign yet that she plans to stay in the race for the nomination. Klobuchar campaign manager Justin Buoen says in a memo Monday that Klobuchar remains “a top choice for persuading Republican and independent voters we need in order to beat Donald Trump in the fall” and is “the best person to take on Bernie Sanders.” With Sanders’ commanding win in the Nevada caucuses there have been calls for Klobuchar and other moderate candidates to drop out of the race.