Who was winning in may the year before each election since 1960

[dw93]

May 1963: Kennedy decisively beats Goldwater
May 1967: Romney, Rockefeller, or Nixon narrowly beat LBJ
May 1971: Toss up, tilt Muskie narrowly beating Nixon
May 1975: Jackson beats Ford or Reagan in a landslide
May 1979: Carter loses the nomination, Reagan narrowly beats Kennedy
May 1983: Reagan narrowly beats Mondale.
May 1987: Hart decisviely beats Bush
May 1991: Bush beats any Democrat by a landslide
May 1995: Powell (if he were to run) beats Clinton. Clinton narrowly beats any other Republican nominee.
May 1999: Bush decisively beats Gore
May 2003: Bush decisively beats any Democrat
May 2007: Hillary narrowly beats Giuliani
May 2011: Obama narrowly beats Romney
May 2015: Hillary decisviely beats Jeb!, narrowly loses to any other credible Republican nominee not named Ted Cruz.
May 2019: Biden wins the popular vote, narrowly loses the EC to Trump.