Democrat’s claims that sea level rise has doubled, are based on a hockey stick approach – where they changed measurement systems in 1994. Did tide gauges stop working in 1994, like tree rings did in the 1960s?
The graph below shows the Democratic nature trick. The thick blue line is the tide gauge trend, and the narrow black line is the altimetry trend. Shown at the same scale.
Even using this bogus approach, the claims of doubling are not accurate.