WASHINGTON (AP) — To hear party operatives describe the fight for the Senate, it's the boogeyman billionaires against the shifty septuagenarian.

Senate Majority Leader Harry Reid has been relentless in his criticism against the wealthy industrialists Charles and David Koch (kohk), who fund a network of conservative groups.

Now, Republicans are adjusting their plans and going after the 74-year-old Democratic Senate leader.

A Republican National Committee advice memo released Wednesday says, quote, "There's little doubt that Harry Reid is abusing his power as majority leader." The GOP memo urges candidates to tie their rivals to Reid.

A Reid spokesman says the new plan shows the GOP is taking orders from the Koch brothers.

The Senate Democrats' campaign committee says the strategy shows the GOP's campaign against the national health care law is failing.