House Freedom Caucus members, who want to shrink the role of government, are demanding reductions in government spending.
The Freedom Caucus members also raised significant sums from larger donors and traditional political fundraising committees.
Unlike other congressional caucuses, the House Freedom Caucus doesn't disclose its membership, a practice that began in 2015.
While McCarthy has pledged that the government won't default, the Republicans' narrow 222-212 majority has given outsized power to the Freedom Caucus.
'I AIN'T LISTENING'Freedom Caucus members are among the most conservative members of Congress, according to their voting records.