US President Donald Trump's new communications adviser has said it is time to hit the "reset button".

PRESIDENT Barack Obama yesterday picked Elena Kagan, a “trailblazing” legal scholar, to sit on the US Supreme Court, seeking to lock in decades of liberal consensus building on the conservative-dominated bench.

MICHELLE OBAMA will bring the skills of a corporate lawyer to the White House if her husband wins the US presidency, but she says her priority will be her role as “mom-in-chief” to the couple’s daughters.

“Our time has come, our movement is real and change is coming to America,” Barack Obama said as the race for the Democratic Party’s presidential nomination moves on from Super Tuesday.