For this proposal to pass, it requires 35% quorum and 66.7% supermajority.
Deepest and only xSUSHI pool is xSUSHI/ETH on SushiSwap with a $12,733,899.18 liquidity (Figure 1).

Figure 1 - Exchanges that trade xSUSHI. Taken from https://www.coingecko.com/en/coins/xsushi#markets.
xSUSHI is minted when SUSHI is deposited in the SushiBar. The xSUSHI contract is a standard OpenZeppelin ERC-20 contract. The contracts don't have any permissions that grant administrators unrestricted mint/burn capabilities.
xSushi doesn't have a supply cap but it's supply is limited to the capped-supply of SUSHI, thus no more than 250,000,000 xSUSHI can ever exist. The top 15 contracts and addresses with the highest concentration of SUSHI tokens are the token contract, the SushiBar contract, Binance, and several wallets. It should be noted that three private wallets in the top 5 holders collectively own approx. 16.48% of the xSUSHI tokens (Figure 2). Finally, being able to be used as a collateral on AAVE brings some confidence on the security of xSUSHI.
Figure 2 - Top 10 holders of xSUSHI, taken from https://etherscan.io/token/0x8798249c2E607446EfB7Ad49eC89dD1865Ff4272.
SushiSwap (SUSHI) is an automated market maker, launched in September 2020 as a fork of Uniswap and aims to diversify the AMM market and also add additional features not previously present on Uniswap, such as increased rewards for network participants via its in-house token, SUSHI.
The platform takes a 0.3% cut from transactions occurring in its liquidity pools, while its SUSHI token is used to reward users portions of those fees. SUSHI also entitles users to governance rights.
xSUSHI is a token similar to our SushiSwap's Liquidity Provider tokens, that you receive in exchange for staking SUSHI tokens in the Sushibar. While holding the token, it will appreciate in value, as fees from the SushiSwap exchange platform are "served to the Sushibar". The xSUSHI token is always worth more than a regular SUSHI token.
SUSHI is active on Reddit and Discord. The SushiSwap team also operates official Twitter and Medium accounts. Github activity is frequent.
The xSUSHI ERC-20 token contract is a standard OpenZeppelin contract. SushiSwap contracts have been audited by Peckshield, Quantstamp and others.
[1] Data taken from https://www.coingecko.com/en/coins/xsushi [2] Data taken from https://analytics.sushi.com/tokens/0X8798249C2E607446EFB7AD49EC89DD1865FF4272