Raiding, also known as depredation, is a military tactic or operational warfare mission which has a specific purpose. Raiders do not capture and hold a location, but quickly retreat to a previous defended position before enemy forces can respond in a coordinated manner or formulate a counter-attack.

What does being raided mean?

to steal from; loot: a worry that the investment fund is being raided. to entice away from another: Large companies are raiding key personnel from smaller companies. to indulge oneself by taking from, especially in order to eat: raiding the cookie jar.

What is raiding with a party?

Party raiding is a tactic in American politics where members of one party vote in another party's primary election in an effort to either nominate a weaker candidate or prolong divided support between two or more contenders for that party's nomination (especially for president).