See today's WaPo "Has your US Congress person received donations from the NRA?" for the breakdown in parties. They report there were a total of ten (10) current Democratic Senators and Congressmen out of 49 Senators and 258 Congressmen accepting some $125,000 of a total $3.7 million in donations from the NRA. 10 of 307 or about 3% is a miniscule fraction.