Hillary Clinton has had a relatively successful presidency, but I see her stepping down after one term. However, her Vice-President, John Hickenlooper, chooses not to run, being 68. Since Hillary, in an attempt to not be rendered a lame-duck for half her term, chose to declare she would not run in August 2019, this renders things rather chaotic for the Democrats. Eventually the tickets are as follows:
Gov. Andrew Cuomo (D-NY)/Fmr. Sec. Kathleen McGinty (D-PA)
Gov. Brian Sandoval (R-NV)/Sen. T.W. Shannon (R-OK)368 Cuomo - 170 Sandoval