Members of a countries legislature includes members of congress (house + senate), and members of parliament, it doesn't include civil service workers.

Between April and December this year (inclusive), a member of the legislature of the respective county, physically fights with another member while being in a formal location of the legislature such as the senate or parliament. It doesn't count if it's just a pub or other sort of location within the grounds. If it's somehow authorised then that country resolves N/A.

Including but not limited to punching, grappling, kicking, pulling over, tripping up that results in the opponent going over like a plank, striking with items such as a chair, throwing items. It may be completely one sided, such as a punch that incapacitates in one hit that the victim didn't know would be coming.

Insufficient for it to be a failed trip-up that doesn't escalate, or a small thing like a pat on the shoulder or bumping into each other, even if done somewhat aggressively.

Add extra answers yourselves.

For example the following resolves "yes" for the UK:

Two of the 1430 members of the UK parliament (Bob and Scott) are in parliament in the UK, the conversation becomes heated, they end up yelling at each other over a policy disagreement. Bob shoves Scott repeatedly, Scott has enough and charges at Bob rugby tackling him to the ground, others get involved and separate them.