well guarded along both sides of the aisles. >> reporter: any of his nominees will have to make it through the senate in order to get through the high court. >> what about senate republicans? any signs they would push back? >> reporter: both of the president's first two picks got tough questioning during the confirmation process but were ultimately approved with bi-partisan votes in the senate. many republicans say hey, elections have consequences. they will defer to the president unless his pick is considered way outside the mainstream of legal thoughts. >> it should be an extraordinary step to filibuster a supreme court nominee, really a nominee to any court, and whether there are 40 votes to do that for a more progressive nominee i think remains to be seen. >> reporter: supreme court picks are, of course, one of the most parts of enenduring presidential legacy, sure to endure for decades after a president leaves office. >> it will be interesting to watch the next four years and