When former President Donald Trump agreed to address a conference hosted by an organization that opposes abortion in all circumstances, President Joe Biden’s campaign cited the appearance as evidence of Trump’s extremism on the issue. But in his brief recorded remarks at the Danbury Institute’s Life & Liberty Forum in Indianapolis on Monday, Trump did not explicitly mention abortion at all, although he paid lip service to the value of “innocent life.” That episode reflects the dilemma Trump faces as he tries to retain the support of pro-life activists without alienating voters who reject the h…