NH, VT, RI, CT, MD and other small states don’t need 2 Senators any longer.
The Senate is a joke. It was supposed to look out after states’ interests as a check on federal power. But the 17th Amendment changed all that and federalism is dead now.
The House of Representatives have representatives that reflect the number of citizens of the district in a State. The House votes on issues that need the OK from the number of citizens represented by their elected Congresscritter. There are 435 Congresscritters. The House is responsible for the Purse (Budget).
The Senate has representatives that reflect the number of States irrespective on the size of the State and the size of its population. The Senate is the deliberative political body and each State has equal representation, i.e. two Senators. The Senate confirms Judges, political appointees made by the POTUS, etc.