This is obviously just one poll, but we can also look at recent averages, which point in the same direction. The Huffington Post’s polling aggregator shows the president’s job-approval numbers topping 50% and “above water” – approval outpacing disapproval – since early March.This matches the support Obama enjoyed around his second inaugural, and it’s the longest sustained levels of support since his first year in office. According to Gallup data, Obama is also slightly more popular now than Ronald Reagan was at this point in the Republican icon’s second term.As we’ve discussed before, the standard pushback to reports like these is that the president is prohibited from seeking re-election, so while his public backing may matter to his long-term legacy, its current salience is limited. I continue to think this understates matters.Remember, one of the standard Republican arguments in 2016 is that Hillary Clinton, if elected, would effectively offer a “third term” for Obama. With unemployment at 5% , the uninsured rate reaching the lowest levels on record , and the president’s approval rating looking pretty good, there are more than a few Americans who are likely to respond to the charge by saying, “That doesn’t sound that bad.”At the same time, as Rachel has explained on the show, Obama is hitting the campaign trial with great vigor on Hillary Clinton’s behalf – more so than any retiring president in the modern political era . The more popular he is, the more effective the president is as a cheerleader for his party’s nominee.It’s easy to forget, but around two years ago at this time, Obama expected to keep a relatively low profile in the 2016 election cycle. The Democratic nominee, he predicted in November 2014, whomever he or she might be, is “probably not gonna be looking at me to campaign too much.”Obama’s approval rating was nearly 10 points lower at that point than it is now.The chatter about 2016 being a “ change election ” has long appeared dubious, and as the president’s support climbs, it’s that much more difficult to believe the electorate is desperate for a radical departure.