Convert the following Python code to R

# Since the user requested to redesign a graph using R and critique it$,$ I'll generate a suitable Python code that simulates how a ggplot code would work in R$.$

# However, for now, I'll proceed with Python code to critique and redesign the graph to best illustrate the analysis.

import matplotlib.pyplot as plt

import numpy as np

# Sample word usage data for both Democratic and Republican National Conventions, assuming from the article

words $=["$freedom$",$ "justice", "economy", "healthcare", "democracy", "jobs", "opportunity", "leadership"$]$

democratic$\_$freq $=[120,98,85,140,110,90,125,115]$

republican$\_$freq $=[110,95,80,135,105,85,115,110]$

# Set up the figure and axes

fig, ax $=$ plt$.$subplots$($figsize$=(10,6))$

# Set positions and width for bars

bar$\_$width $=0\mathrm{.}35$

index $=$ np$.$arange$($len$($words$))$

# Bar plot for Democratic and Republican conventions

bars$1=$ ax$.$bar$($index$,$ democratic$\_$freq, bar$\_$width, label$=$'Democratic', color$=$'blue'$)$

bars$2=$ ax$.$bar$($index $+$ bar$\_$width, republican$\_$freq, bar$\_$width, label$=$'Republican', color$=$'red'$)$

# Adding labels and title

ax$.$set$\_$xlabel$(\text{'}$Words Used'$)$

ax$.$set$\_$ylabel$(\text{'}$Frequency of Usage'$)$

ax$.$set$\_$title$(\text{'}$Words Used at Democratic and Republican National Conventions'$)$

ax$.$set$\_$xticks$($index $+$ bar$\_$width $/2)$

ax$.$set$\_$xticklabels$($words$)$

ax$.$legend$()$

# Adding a grid and adjusting layout

ax$.$grid$($True$,$ axis$=\text{'}$y$\text{'},$ linestyle$=\text{'}--\text{'},$ alpha$=0\mathrm{.}7)$

plt$.$tight$\_$layout$()$

# Display the plot

plt$.$show$()$