The phrase "a big bloc" is correct and usable in written English.
It can be used to refer to a large group or coalition of people or entities that share a common interest or goal.
Example: "The political party formed a big bloc to push for the new legislation."
Alternatives: "a large coalition" or "a significant group".
Sadr's soldiers were heavily implicated in the brutal sectarian violence of 2006 to 2008, but he has since renamed his army the Saraya al-Salam — the Peace Brigades — and now controls a big bloc in parliament as well as his own political party.
"And on that matter, for example, I think it's fair to say that maybe at some point down the line there might be a UK-US trade agreement, but it's not going to happen any time soon because our focus is on negotiating with a big bloc, the European Union, to get a trade agreement done.
"I think it's fair to say that maybe [at] some point down the line there might be a U.S.-U.K. trade agreement, but it's not going to happen any time soon because our focus is in negotiating with a big bloc, the European Union, to get a trade agreement done.
Hizbullah won a big bloc and was part of the elections, Hariri said.
Yet despite running a ramshackle campaign and alienating a big bloc of economic conservatives, Huckabee was the last man standing with McCain in the 2008 primaries.
The advantage for her and the CDU is that this "black-red" combination would be such a big bloc in the Bundestag, that whatever it decided would go through.
Sheik Nasrallah said the time is not yet right for Hezbollah to demand a bigger share of political power in Lebanon or even to try to capitalize on its current popularity to win a bigger bloc of seats in parliamentary elections in August.
There'll be a time when, instead of looking down on us like racist fucks, they'll look at us as a big voting bloc.
(Republicans from Long Island have long held a big voting bloc in the State Senate, providing the political might to preserve the arrangement).
The bureaucracy of 30,000 workers, combined with their family members, make up a big political bloc that resists wage cuts or trimming of inefficient agencies.
Whatever Mr. Paterson's plans for Long Island, its 2.8 million residents pose a big voting bloc he will covet if he runs for another term.
