The reason I'm not worried about Pfizer is that regardless of who is in office, there's going to be a need for constant and ongoing innovation in healthcare. Pfizer has been a top name in that regard for decades. Its acquisition of oncology company Seagen last year highlighted its aggressive growth strategy, as the move cost Pfizer $43 billion. It has also pursued smaller companies over the years in a bid to bolster its pipeline and strengthen its growth prospects.