There are several reasons why the role of the federal government in civil rights enforcement changed, but the main one is that southern states were not enforcing federal laws.
Gave necessary powers to the President to wage war.
The resolution states Congress is giving power to the President to do all necessary to defend the US. This resolution allowed the President to make war decision without declaring war under Congress.
In general, history is the recorded story of the interaction between "ideas" "people" and "patterns", since it is the way in which people act and make decisions that influences their collective history.
Democrats had been losing elections in what had long been considered solid Democratic territory in the South. Lyndon B. Johnson, a Democrat who took up the presidency after John F. Kennedy was assassinated, had become associated in the minds of voters with the civil rights movement. The civil rights movement aimed to give black Americans equality. This did not sit well with white voters in the South. In the 1964 presidential election, the Republican candidate, Barry Goldwater, won the states of Louisiana, Mississippi, Alabama, Georgia, and South Carolina. Nevertheless, Johnson prevailed and won the election. But it showed conservative Democrats were willing to shift to the Republican party if they felt it more closely aligned with their views.