In keeping with the title of this thread...
"Obama is prepared to campaign for his party's presidential nominee more than any sitting president in recent history. That could be a big problem for the GOP and its nominee, Donald Trump. And a huge boon for Clinton.
The president's approval rating got its own convention bump: In a
CNN/ORC poll conducted after the convention, 54% of Americans said they approved of Obama's job performance. It was his highest mark since right before his second inauguration in 2013. Just 45% disapproved.
That number is significant. Earlier this year, an NBC/Wall Street Journal poll found that President Barack Obama's approval rating had jumped to 51% — its highest point since his second inauguration.
NBC's team of political analysts called it the "most important number" out of the poll."
Obama approval rating could be GOP problem - Business Insider