Anti-abortion advocates are feeling “abandoned,” by Republican presidential nominee Donald Trump, who has shifted the party-platform from staunchly pro-life to a side-stepped subject with a murky policy agenda during his second bid for the White House. In anOp-Ed penned for the New York Times Friday, conservative policy analyst Patrick T. Brown bemoaned the future of a Republican party led by Trump waffling on abortion. “The Republican nominee seems all too content to sell out those of us who got into politics to advance policies that protect what we see as human life from its earliest stages,…