KSAT 12: Six things to know about Congressional Baseball Game

WASHINGTON, DC - For more than 100 years, the Congressional Baseball Game has been a trademark for both Democrats and Republicans in setting aside political differences and taking part in a tradition destined for unity.

Just a day before the game was to be held at Nationals Park, a gunman -- now identified as James T. Hodgkinson -- opened fire on Republican lawmakers and staff who were practicing at a baseball field Wednesday morning in Alexandria, Virginia.

House Speaker Rep. Paul Ryan, of Wisconsin, addressed the House in the wake of Wednesday's shooting announcing the game will go on as scheduled and sharing, "An attack on one of us is an attack on all us."

Here's what you need to know about the Congressional Baseball Game

1) History of Congressional Baseball Game

According to the game's official website, the showdown between the two parties dates back when Rep. John Tener of Pennsylvania, a former professional baseball player, organized the inaugural baseball game in 1909………

The other four were Democrat Rep. Marc Veasey and Republicans Reps. Kevin Brady, Mike Conaway, and Roger Williams. It is uncertain if all 34 Republicans were present when Hodgkinson opened fire during Wednesday's baseball practice, wounding top House Republican Steve Scalise of Louisiana and 4 others.