Among the American tennis players, most of the recent few have been bigtime Republicans - Chris Evert, Jimmy Connors, Ivan Lendl, Tracy Austin, Pam Shriver, Pete Sampras, Jim Courier, Lindsay Davenport etc. etc.
The handful of Democrats include Martina Navratilova, John McEnroe, Billie Jean King, Andre Agassi, Venus & Serena Williams.
Martina said that when she first came to the U.S. she identified as a Republican (the Rockefeller kind) but after the Reagan Right took over, she became an ardent Democrat. Martina did support Bill Bradley in the 2000 Democratic primary along with McEnroe; Martina is also a regular contributor to Emily's List, the powerful political organization dedicated to electing pro-choice Democratic women. Billie Jean King was a big contributor to Senator Hillary Clinton's campaign last year, along with Andre Agassi, who also gave big to Vice-President Al Gore's campaign.
Evert, Austin & Shriver were/are huge Republicans and got invited to the White House on a number of occasions during the Reagan/Bush I years; also both inaugrations (1985 & 1989). Bush Sr. plays in Evert's charity event every year. Tracy Austin is very close to Nancy Reagan. Pam Shriver used to gush endlessly about President Reagan (he and his wife used to call her "Pammy"). Pam was also a contributor to Dubya's campaign last year. And she was vice-chairman of "Athletes for Bush/Quayle" in 1988. Oddly enough though, Pam & Tracy participated in a fundraiser for Congresswoman Jane Harman in California last year (she's a Democrat, who ran unsuccessfully for California governor in 1998 and reclaimed her House seat last year). Congresswoman Harman is reputed for her fiscally conservative, socially liberal, hawkish on defence positions so that certainly must fit in well with Pam.
Ivan Lendl is a firm Republican. There's the story about the time someone told him he voted for Dukakis in 1988, to which Lendl replied, "So you're a Communist?" Lendl & Martina were the total opposite. They got along fine, but Lendl said he felt Martina was too radical and Martina thought he was too set in his ways.
I remember Monica was asked about the 1996 election back in the day, and she said she didn't vote b/c she didn't like the candidates. Both Clinton & Dole were moderates within their own parties. So I guess it's safe to deduce that Monica is either a flaming liberal or a dyed-in-the-wool conservative...